Home / 15,478.27-21,360.45-9,105.33

Finding the Fourth Proportional to 15,478.27, 21,360.45 and 9,105.33

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Solution

The fourth proportional to 15,478.27, 21,360.45 and 9,105.33 is: 12,565.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.27 : 21,360.45 = 9,105.33 : x
  2. Step 2: Convert to fraction form
    15,478.27/21,360.45 = 9,105.33/x
  3. Step 3: Cross multiply
    15,478.27x = 21,360.45 × 9,105.33
  4. Step 4: Simplify right side
    15,478.27x = 194,493,946.20
  5. Step 5: Solve for x
    x = 194,493,946.20/15,478.27
  6. Step 6: Final answer
    x = 12,565.61

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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.