Home / 21,455.52-29,612.16-13,071.48

Finding the Fourth Proportional to 21,455.52, 29,612.16 and 13,071.48

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Solution

The fourth proportional to 21,455.52, 29,612.16 and 13,071.48 is: 18,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.52 : 29,612.16 = 13,071.48 : x
  2. Step 2: Convert to fraction form
    21,455.52/29,612.16 = 13,071.48/x
  3. Step 3: Cross multiply
    21,455.52x = 29,612.16 × 13,071.48
  4. Step 4: Simplify right side
    21,455.52x = 387,074,757.20
  5. Step 5: Solve for x
    x = 387,074,757.20/21,455.52
  6. Step 6: Final answer
    x = 18,040.80

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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.