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Finding the Fourth Proportional to 18,658.56, 25,740.48 and 10,699.20

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Solution

The fourth proportional to 18,658.56, 25,740.48 and 10,699.20 is: 14,760.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.56 : 25,740.48 = 10,699.20 : x
  2. Step 2: Convert to fraction form
    18,658.56/25,740.48 = 10,699.20/x
  3. Step 3: Cross multiply
    18,658.56x = 25,740.48 × 10,699.20
  4. Step 4: Simplify right side
    18,658.56x = 275,402,543.62
  5. Step 5: Solve for x
    x = 275,402,543.62/18,658.56
  6. Step 6: Final answer
    x = 14,760.12

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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.