Home / 39,044.18-53,880.89-21,139.20

Finding the Fourth Proportional to 39,044.18, 53,880.89 and 21,139.20

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Solution

The fourth proportional to 39,044.18, 53,880.89 and 21,139.20 is: 29,172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,044.18 : 53,880.89 = 21,139.20 : x
  2. Step 2: Convert to fraction form
    39,044.18/53,880.89 = 21,139.20/x
  3. Step 3: Cross multiply
    39,044.18x = 53,880.89 × 21,139.20
  4. Step 4: Simplify right side
    39,044.18x = 1,138,998,909.89
  5. Step 5: Solve for x
    x = 1,138,998,909.89/39,044.18
  6. Step 6: Final answer
    x = 29,172.05

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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.