Home / 20,937.36-28,876.16-13,864.40

Finding the Fourth Proportional to 20,937.36, 28,876.16 and 13,864.40

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Solution

The fourth proportional to 20,937.36, 28,876.16 and 13,864.40 is: 19,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.36 : 28,876.16 = 13,864.40 : x
  2. Step 2: Convert to fraction form
    20,937.36/28,876.16 = 13,864.40/x
  3. Step 3: Cross multiply
    20,937.36x = 28,876.16 × 13,864.40
  4. Step 4: Simplify right side
    20,937.36x = 400,350,632.70
  5. Step 5: Solve for x
    x = 400,350,632.70/20,937.36
  6. Step 6: Final answer
    x = 19,121.35

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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.