Home / 15,538.72-21,450-14,724.40

Finding the Fourth Proportional to 15,538.72, 21,450 and 14,724.40

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Solution

The fourth proportional to 15,538.72, 21,450 and 14,724.40 is: 20,325.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,538.72 : 21,450 = 14,724.40 : x
  2. Step 2: Convert to fraction form
    15,538.72/21,450 = 14,724.40/x
  3. Step 3: Cross multiply
    15,538.72x = 21,450 × 14,724.40
  4. Step 4: Simplify right side
    15,538.72x = 315,838,380
  5. Step 5: Solve for x
    x = 315,838,380/15,538.72
  6. Step 6: Final answer
    x = 20,325.89

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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.