Home / 13,657.38-18,845.13-7,688.70

Finding the Fourth Proportional to 13,657.38, 18,845.13 and 7,688.70

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Solution

The fourth proportional to 13,657.38, 18,845.13 and 7,688.70 is: 10,609.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.38 : 18,845.13 = 7,688.70 : x
  2. Step 2: Convert to fraction form
    13,657.38/18,845.13 = 7,688.70/x
  3. Step 3: Cross multiply
    13,657.38x = 18,845.13 × 7,688.70
  4. Step 4: Simplify right side
    13,657.38x = 144,894,551.03
  5. Step 5: Solve for x
    x = 144,894,551.03/13,657.38
  6. Step 6: Final answer
    x = 10,609.25

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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.