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Finding the Fourth Proportional to 15,654.86, 21,603.78 and 8,484.78

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Solution

The fourth proportional to 15,654.86, 21,603.78 and 8,484.78 is: 11,709.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,654.86 : 21,603.78 = 8,484.78 : x
  2. Step 2: Convert to fraction form
    15,654.86/21,603.78 = 8,484.78/x
  3. Step 3: Cross multiply
    15,654.86x = 21,603.78 × 8,484.78
  4. Step 4: Simplify right side
    15,654.86x = 183,303,320.47
  5. Step 5: Solve for x
    x = 183,303,320.47/15,654.86
  6. Step 6: Final answer
    x = 11,709.04

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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.