Home / 15,712.28-21,683.02-8,639.15

Finding the Fourth Proportional to 15,712.28, 21,683.02 and 8,639.15

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Solution

The fourth proportional to 15,712.28, 21,683.02 and 8,639.15 is: 11,922.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.28 : 21,683.02 = 8,639.15 : x
  2. Step 2: Convert to fraction form
    15,712.28/21,683.02 = 8,639.15/x
  3. Step 3: Cross multiply
    15,712.28x = 21,683.02 × 8,639.15
  4. Step 4: Simplify right side
    15,712.28x = 187,322,862.23
  5. Step 5: Solve for x
    x = 187,322,862.23/15,712.28
  6. Step 6: Final answer
    x = 11,922.07

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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.