Home / 39,899.52-55,080-23,129.28

Finding the Fourth Proportional to 39,899.52, 55,080 and 23,129.28

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Solution

The fourth proportional to 39,899.52, 55,080 and 23,129.28 is: 31,929.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,899.52 : 55,080 = 23,129.28 : x
  2. Step 2: Convert to fraction form
    39,899.52/55,080 = 23,129.28/x
  3. Step 3: Cross multiply
    39,899.52x = 55,080 × 23,129.28
  4. Step 4: Simplify right side
    39,899.52x = 1,273,960,742.40
  5. Step 5: Solve for x
    x = 1,273,960,742.40/39,899.52
  6. Step 6: Final answer
    x = 31,929.22

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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.