Home / 20,587.56-28,400.36-13,021.17

Finding the Fourth Proportional to 20,587.56, 28,400.36 and 13,021.17

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Solution

The fourth proportional to 20,587.56, 28,400.36 and 13,021.17 is: 17,962.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.56 : 28,400.36 = 13,021.17 : x
  2. Step 2: Convert to fraction form
    20,587.56/28,400.36 = 13,021.17/x
  3. Step 3: Cross multiply
    20,587.56x = 28,400.36 × 13,021.17
  4. Step 4: Simplify right side
    20,587.56x = 369,805,850.52
  5. Step 5: Solve for x
    x = 369,805,850.52/20,587.56
  6. Step 6: Final answer
    x = 17,962.59

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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.