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Finding the Fourth Proportional to 14,605.70, 20,155.88 and 7,891.32

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Solution

The fourth proportional to 14,605.70, 20,155.88 and 7,891.32 is: 10,890.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,605.70 : 20,155.88 = 7,891.32 : x
  2. Step 2: Convert to fraction form
    14,605.70/20,155.88 = 7,891.32/x
  3. Step 3: Cross multiply
    14,605.70x = 20,155.88 × 7,891.32
  4. Step 4: Simplify right side
    14,605.70x = 159,056,459.51
  5. Step 5: Solve for x
    x = 159,056,459.51/14,605.70
  6. Step 6: Final answer
    x = 10,890.03

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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.