Home / 15,429.90-21,293.20-8,715.18

Finding the Fourth Proportional to 15,429.90, 21,293.20 and 8,715.18

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Solution

The fourth proportional to 15,429.90, 21,293.20 and 8,715.18 is: 12,026.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.90 : 21,293.20 = 8,715.18 : x
  2. Step 2: Convert to fraction form
    15,429.90/21,293.20 = 8,715.18/x
  3. Step 3: Cross multiply
    15,429.90x = 21,293.20 × 8,715.18
  4. Step 4: Simplify right side
    15,429.90x = 185,574,070.78
  5. Step 5: Solve for x
    x = 185,574,070.78/15,429.90
  6. Step 6: Final answer
    x = 12,026.91

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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.