Home / 15,564.20-21,478.82-8,490.62

Finding the Fourth Proportional to 15,564.20, 21,478.82 and 8,490.62

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Solution

The fourth proportional to 15,564.20, 21,478.82 and 8,490.62 is: 11,717.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.20 : 21,478.82 = 8,490.62 : x
  2. Step 2: Convert to fraction form
    15,564.20/21,478.82 = 8,490.62/x
  3. Step 3: Cross multiply
    15,564.20x = 21,478.82 × 8,490.62
  4. Step 4: Simplify right side
    15,564.20x = 182,368,557.67
  5. Step 5: Solve for x
    x = 182,368,557.67/15,564.20
  6. Step 6: Final answer
    x = 11,717.18

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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.