Home / 10,931.71-15,085.50-6,215.68

Finding the Fourth Proportional to 10,931.71, 15,085.50 and 6,215.68

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Solution

The fourth proportional to 10,931.71, 15,085.50 and 6,215.68 is: 8,577.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.71 : 15,085.50 = 6,215.68 : x
  2. Step 2: Convert to fraction form
    10,931.71/15,085.50 = 6,215.68/x
  3. Step 3: Cross multiply
    10,931.71x = 15,085.50 × 6,215.68
  4. Step 4: Simplify right side
    10,931.71x = 93,766,640.64
  5. Step 5: Solve for x
    x = 93,766,640.64/10,931.71
  6. Step 6: Final answer
    x = 8,577.49

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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.