Home / 10,931.68-15,085.20-6,215.44

Finding the Fourth Proportional to 10,931.68, 15,085.20 and 6,215.44

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Solution

The fourth proportional to 10,931.68, 15,085.20 and 6,215.44 is: 8,577.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.68 : 15,085.20 = 6,215.44 : x
  2. Step 2: Convert to fraction form
    10,931.68/15,085.20 = 6,215.44/x
  3. Step 3: Cross multiply
    10,931.68x = 15,085.20 × 6,215.44
  4. Step 4: Simplify right side
    10,931.68x = 93,761,155.49
  5. Step 5: Solve for x
    x = 93,761,155.49/10,931.68
  6. Step 6: Final answer
    x = 8,577.01

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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.