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Finding the Fourth Proportional to 14,842.92, 20,485.13 and 8,555.34

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Solution

The fourth proportional to 14,842.92, 20,485.13 and 8,555.34 is: 11,807.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,842.92 : 20,485.13 = 8,555.34 : x
  2. Step 2: Convert to fraction form
    14,842.92/20,485.13 = 8,555.34/x
  3. Step 3: Cross multiply
    14,842.92x = 20,485.13 × 8,555.34
  4. Step 4: Simplify right side
    14,842.92x = 175,257,209.32
  5. Step 5: Solve for x
    x = 175,257,209.32/14,842.92
  6. Step 6: Final answer
    x = 11,807.46

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.