Home / 10,909.47-15,037.11-7,718.70

Finding the Fourth Proportional to 10,909.47, 15,037.11 and 7,718.70

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Solution

The fourth proportional to 10,909.47, 15,037.11 and 7,718.70 is: 10,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,909.47 : 15,037.11 = 7,718.70 : x
  2. Step 2: Convert to fraction form
    10,909.47/15,037.11 = 7,718.70/x
  3. Step 3: Cross multiply
    10,909.47x = 15,037.11 × 7,718.70
  4. Step 4: Simplify right side
    10,909.47x = 116,066,940.96
  5. Step 5: Solve for x
    x = 116,066,940.96/10,909.47
  6. Step 6: Final answer
    x = 10,639.10

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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.