Home / 21,728.32-29,981.28-13,347.52

Finding the Fourth Proportional to 21,728.32, 29,981.28 and 13,347.52

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Solution

The fourth proportional to 21,728.32, 29,981.28 and 13,347.52 is: 18,417.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.32 : 29,981.28 = 13,347.52 : x
  2. Step 2: Convert to fraction form
    21,728.32/29,981.28 = 13,347.52/x
  3. Step 3: Cross multiply
    21,728.32x = 29,981.28 × 13,347.52
  4. Step 4: Simplify right side
    21,728.32x = 400,175,734.43
  5. Step 5: Solve for x
    x = 400,175,734.43/21,728.32
  6. Step 6: Final answer
    x = 18,417.24

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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.