Home / 21,569.15-29,764.28-12,138.32

Finding the Fourth Proportional to 21,569.15, 29,764.28 and 12,138.32

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Solution

The fourth proportional to 21,569.15, 29,764.28 and 12,138.32 is: 16,750.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,569.15 : 29,764.28 = 12,138.32 : x
  2. Step 2: Convert to fraction form
    21,569.15/29,764.28 = 12,138.32/x
  3. Step 3: Cross multiply
    21,569.15x = 29,764.28 × 12,138.32
  4. Step 4: Simplify right side
    21,569.15x = 361,288,145.70
  5. Step 5: Solve for x
    x = 361,288,145.70/21,569.15
  6. Step 6: Final answer
    x = 16,750.23

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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.