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Finding the Fourth Proportional to 27,762, 38,311.56 and 15,186.75

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Solution

The fourth proportional to 27,762, 38,311.56 and 15,186.75 is: 20,957.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,762 : 38,311.56 = 15,186.75 : x
  2. Step 2: Convert to fraction form
    27,762/38,311.56 = 15,186.75/x
  3. Step 3: Cross multiply
    27,762x = 38,311.56 × 15,186.75
  4. Step 4: Simplify right side
    27,762x = 581,828,083.83
  5. Step 5: Solve for x
    x = 581,828,083.83/27,762
  6. Step 6: Final answer
    x = 20,957.72

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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.