Home / 15,728.13-21,705.02-8,654.40

Finding the Fourth Proportional to 15,728.13, 21,705.02 and 8,654.40

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Solution

The fourth proportional to 15,728.13, 21,705.02 and 8,654.40 is: 11,943.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.13 : 21,705.02 = 8,654.40 : x
  2. Step 2: Convert to fraction form
    15,728.13/21,705.02 = 8,654.40/x
  3. Step 3: Cross multiply
    15,728.13x = 21,705.02 × 8,654.40
  4. Step 4: Simplify right side
    15,728.13x = 187,843,925.09
  5. Step 5: Solve for x
    x = 187,843,925.09/15,728.13
  6. Step 6: Final answer
    x = 11,943.18

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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.