Home / 20,937.13-28,893.88-11,987.51

Finding the Fourth Proportional to 20,937.13, 28,893.88 and 11,987.51

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Solution

The fourth proportional to 20,937.13, 28,893.88 and 11,987.51 is: 16,543.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.13 : 28,893.88 = 11,987.51 : x
  2. Step 2: Convert to fraction form
    20,937.13/28,893.88 = 11,987.51/x
  3. Step 3: Cross multiply
    20,937.13x = 28,893.88 × 11,987.51
  4. Step 4: Simplify right side
    20,937.13x = 346,365,545.95
  5. Step 5: Solve for x
    x = 346,365,545.95/20,937.13
  6. Step 6: Final answer
    x = 16,543.13

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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.