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Finding the Fourth Proportional to 15,064.86, 20,781.08 and 9,603.74

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Solution

The fourth proportional to 15,064.86, 20,781.08 and 9,603.74 is: 13,247.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,064.86 : 20,781.08 = 9,603.74 : x
  2. Step 2: Convert to fraction form
    15,064.86/20,781.08 = 9,603.74/x
  3. Step 3: Cross multiply
    15,064.86x = 20,781.08 × 9,603.74
  4. Step 4: Simplify right side
    15,064.86x = 199,576,089.24
  5. Step 5: Solve for x
    x = 199,576,089.24/15,064.86
  6. Step 6: Final answer
    x = 13,247.79

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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.