Home / 15,531.12-21,433.28-8,457.54

Finding the Fourth Proportional to 15,531.12, 21,433.28 and 8,457.54

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Solution

The fourth proportional to 15,531.12, 21,433.28 and 8,457.54 is: 11,671.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.12 : 21,433.28 = 8,457.54 : x
  2. Step 2: Convert to fraction form
    15,531.12/21,433.28 = 8,457.54/x
  3. Step 3: Cross multiply
    15,531.12x = 21,433.28 × 8,457.54
  4. Step 4: Simplify right side
    15,531.12x = 181,272,831.91
  5. Step 5: Solve for x
    x = 181,272,831.91/15,531.12
  6. Step 6: Final answer
    x = 11,671.59

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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.