Home / 39,217.89-54,121.04-21,312.90

Finding the Fourth Proportional to 39,217.89, 54,121.04 and 21,312.90

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Solution

The fourth proportional to 39,217.89, 54,121.04 and 21,312.90 is: 29,411.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,217.89 : 54,121.04 = 21,312.90 : x
  2. Step 2: Convert to fraction form
    39,217.89/54,121.04 = 21,312.90/x
  3. Step 3: Cross multiply
    39,217.89x = 54,121.04 × 21,312.90
  4. Step 4: Simplify right side
    39,217.89x = 1,153,476,071.55
  5. Step 5: Solve for x
    x = 1,153,476,071.55/39,217.89
  6. Step 6: Final answer
    x = 29,411.99

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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.