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Finding the Fourth Proportional to 28,128.60, 42,192.90 and 14,974.20

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Solution

The fourth proportional to 28,128.60, 42,192.90 and 14,974.20 is: 22,461.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.60 : 42,192.90 = 14,974.20 : x
  2. Step 2: Convert to fraction form
    28,128.60/42,192.90 = 14,974.20/x
  3. Step 3: Cross multiply
    28,128.60x = 42,192.90 × 14,974.20
  4. Step 4: Simplify right side
    28,128.60x = 631,804,923.18
  5. Step 5: Solve for x
    x = 631,804,923.18/28,128.60
  6. Step 6: Final answer
    x = 22,461.30

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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.