Home / 15,508.35-21,400.47-8,434.62

Finding the Fourth Proportional to 15,508.35, 21,400.47 and 8,434.62

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Solution

The fourth proportional to 15,508.35, 21,400.47 and 8,434.62 is: 11,639.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.35 : 21,400.47 = 8,434.62 : x
  2. Step 2: Convert to fraction form
    15,508.35/21,400.47 = 8,434.62/x
  3. Step 3: Cross multiply
    15,508.35x = 21,400.47 × 8,434.62
  4. Step 4: Simplify right side
    15,508.35x = 180,504,832.27
  5. Step 5: Solve for x
    x = 180,504,832.27/15,508.35
  6. Step 6: Final answer
    x = 11,639.20

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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.