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Finding the Fourth Proportional to 18,142.80, 25,038.17 and 11,069.28

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Solution

The fourth proportional to 18,142.80, 25,038.17 and 11,069.28 is: 15,276.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,142.80 : 25,038.17 = 11,069.28 : x
  2. Step 2: Convert to fraction form
    18,142.80/25,038.17 = 11,069.28/x
  3. Step 3: Cross multiply
    18,142.80x = 25,038.17 × 11,069.28
  4. Step 4: Simplify right side
    18,142.80x = 277,154,459.07
  5. Step 5: Solve for x
    x = 277,154,459.07/18,142.80
  6. Step 6: Final answer
    x = 15,276.28

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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.