Home / 15,654.35-21,603.05-8,580.78

Finding the Fourth Proportional to 15,654.35, 21,603.05 and 8,580.78

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Solution

The fourth proportional to 15,654.35, 21,603.05 and 8,580.78 is: 11,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,654.35 : 21,603.05 = 8,580.78 : x
  2. Step 2: Convert to fraction form
    15,654.35/21,603.05 = 8,580.78/x
  3. Step 3: Cross multiply
    15,654.35x = 21,603.05 × 8,580.78
  4. Step 4: Simplify right side
    15,654.35x = 185,370,976.48
  5. Step 5: Solve for x
    x = 185,370,976.48/15,654.35
  6. Step 6: Final answer
    x = 11,841.50

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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.