Home / 15,126.46-20,871.52-9,158.68

Finding the Fourth Proportional to 15,126.46, 20,871.52 and 9,158.68

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Solution

The fourth proportional to 15,126.46, 20,871.52 and 9,158.68 is: 12,637.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.46 : 20,871.52 = 9,158.68 : x
  2. Step 2: Convert to fraction form
    15,126.46/20,871.52 = 9,158.68/x
  3. Step 3: Cross multiply
    15,126.46x = 20,871.52 × 9,158.68
  4. Step 4: Simplify right side
    15,126.46x = 191,155,572.79
  5. Step 5: Solve for x
    x = 191,155,572.79/15,126.46
  6. Step 6: Final answer
    x = 12,637.17

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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.