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Finding the Fourth Proportional to 13,487.65, 18,612.98 and 7,519.20

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Solution

The fourth proportional to 13,487.65, 18,612.98 and 7,519.20 is: 10,376.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.65 : 18,612.98 = 7,519.20 : x
  2. Step 2: Convert to fraction form
    13,487.65/18,612.98 = 7,519.20/x
  3. Step 3: Cross multiply
    13,487.65x = 18,612.98 × 7,519.20
  4. Step 4: Simplify right side
    13,487.65x = 139,954,640.02
  5. Step 5: Solve for x
    x = 139,954,640.02/13,487.65
  6. Step 6: Final answer
    x = 10,376.50

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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.