Home / 15,585.90-21,508.20-8,512.38

Finding the Fourth Proportional to 15,585.90, 21,508.20 and 8,512.38

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Solution

The fourth proportional to 15,585.90, 21,508.20 and 8,512.38 is: 11,746.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.90 : 21,508.20 = 8,512.38 : x
  2. Step 2: Convert to fraction form
    15,585.90/21,508.20 = 8,512.38/x
  3. Step 3: Cross multiply
    15,585.90x = 21,508.20 × 8,512.38
  4. Step 4: Simplify right side
    15,585.90x = 183,085,971.52
  5. Step 5: Solve for x
    x = 183,085,971.52/15,585.90
  6. Step 6: Final answer
    x = 11,746.90

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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.