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Finding the Fourth Proportional to 14,842.56, 20,482.71 and 8,128.19

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Solution

The fourth proportional to 14,842.56, 20,482.71 and 8,128.19 is: 11,216.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,842.56 : 20,482.71 = 8,128.19 : x
  2. Step 2: Convert to fraction form
    14,842.56/20,482.71 = 8,128.19/x
  3. Step 3: Cross multiply
    14,842.56x = 20,482.71 × 8,128.19
  4. Step 4: Simplify right side
    14,842.56x = 166,487,256.18
  5. Step 5: Solve for x
    x = 166,487,256.18/14,842.56
  6. Step 6: Final answer
    x = 11,216.88

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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.