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Finding the Fourth Proportional to 15,507.79, 21,398.99 and 8,793.70

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Solution

The fourth proportional to 15,507.79, 21,398.99 and 8,793.70 is: 12,134.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507.79 : 21,398.99 = 8,793.70 : x
  2. Step 2: Convert to fraction form
    15,507.79/21,398.99 = 8,793.70/x
  3. Step 3: Cross multiply
    15,507.79x = 21,398.99 × 8,793.70
  4. Step 4: Simplify right side
    15,507.79x = 188,176,200.90
  5. Step 5: Solve for x
    x = 188,176,200.90/15,507.79
  6. Step 6: Final answer
    x = 12,134.30

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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.