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Finding the Fourth Proportional to 18,762.87, 28,129.68 and 9,398.06

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Solution

The fourth proportional to 18,762.87, 28,129.68 and 9,398.06 is: 14,089.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.87 : 28,129.68 = 9,398.06 : x
  2. Step 2: Convert to fraction form
    18,762.87/28,129.68 = 9,398.06/x
  3. Step 3: Cross multiply
    18,762.87x = 28,129.68 × 9,398.06
  4. Step 4: Simplify right side
    18,762.87x = 264,364,279.77
  5. Step 5: Solve for x
    x = 264,364,279.77/18,762.87
  6. Step 6: Final answer
    x = 14,089.76

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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.