Home / 15,564.30-21,478.68-8,490.66

Finding the Fourth Proportional to 15,564.30, 21,478.68 and 8,490.66

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Solution

The fourth proportional to 15,564.30, 21,478.68 and 8,490.66 is: 11,717.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.30 : 21,478.68 = 8,490.66 : x
  2. Step 2: Convert to fraction form
    15,564.30/21,478.68 = 8,490.66/x
  3. Step 3: Cross multiply
    15,564.30x = 21,478.68 × 8,490.66
  4. Step 4: Simplify right side
    15,564.30x = 182,368,169.13
  5. Step 5: Solve for x
    x = 182,368,169.13/15,564.30
  6. Step 6: Final answer
    x = 11,717.08

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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.