Home / 10,931.40-16,387.02-4,356

Finding the Fourth Proportional to 10,931.40, 16,387.02 and 4,356

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Solution

The fourth proportional to 10,931.40, 16,387.02 and 4,356 is: 6,529.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.40 : 16,387.02 = 4,356 : x
  2. Step 2: Convert to fraction form
    10,931.40/16,387.02 = 4,356/x
  3. Step 3: Cross multiply
    10,931.40x = 16,387.02 × 4,356
  4. Step 4: Simplify right side
    10,931.40x = 71,381,859.12
  5. Step 5: Solve for x
    x = 71,381,859.12/10,931.40
  6. Step 6: Final answer
    x = 6,529.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.