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Finding the Fourth Proportional to 18,751.40, 28,127.10 and 17,023.40

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Solution

The fourth proportional to 18,751.40, 28,127.10 and 17,023.40 is: 25,535.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.40 : 28,127.10 = 17,023.40 : x
  2. Step 2: Convert to fraction form
    18,751.40/28,127.10 = 17,023.40/x
  3. Step 3: Cross multiply
    18,751.40x = 28,127.10 × 17,023.40
  4. Step 4: Simplify right side
    18,751.40x = 478,818,874.14
  5. Step 5: Solve for x
    x = 478,818,874.14/18,751.40
  6. Step 6: Final answer
    x = 25,535.10

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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.