Home / 21,729.60-29,943.84-15,424.32

Finding the Fourth Proportional to 21,729.60, 29,943.84 and 15,424.32

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Solution

The fourth proportional to 21,729.60, 29,943.84 and 15,424.32 is: 21,255.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.60 : 29,943.84 = 15,424.32 : x
  2. Step 2: Convert to fraction form
    21,729.60/29,943.84 = 15,424.32/x
  3. Step 3: Cross multiply
    21,729.60x = 29,943.84 × 15,424.32
  4. Step 4: Simplify right side
    21,729.60x = 461,863,370.19
  5. Step 5: Solve for x
    x = 461,863,370.19/21,729.60
  6. Step 6: Final answer
    x = 21,255.03

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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.