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Finding the Fourth Proportional to 14,152.17, 21,232.88 and 7,128.86

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Solution

The fourth proportional to 14,152.17, 21,232.88 and 7,128.86 is: 10,695.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,152.17 : 21,232.88 = 7,128.86 : x
  2. Step 2: Convert to fraction form
    14,152.17/21,232.88 = 7,128.86/x
  3. Step 3: Cross multiply
    14,152.17x = 21,232.88 × 7,128.86
  4. Step 4: Simplify right side
    14,152.17x = 151,366,273.38
  5. Step 5: Solve for x
    x = 151,366,273.38/14,152.17
  6. Step 6: Final answer
    x = 10,695.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.