Home / 21,763.52-29,989.16-20,587.20

Finding the Fourth Proportional to 21,763.52, 29,989.16 and 20,587.20

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Solution

The fourth proportional to 21,763.52, 29,989.16 and 20,587.20 is: 28,368.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,763.52 : 29,989.16 = 20,587.20 : x
  2. Step 2: Convert to fraction form
    21,763.52/29,989.16 = 20,587.20/x
  3. Step 3: Cross multiply
    21,763.52x = 29,989.16 × 20,587.20
  4. Step 4: Simplify right side
    21,763.52x = 617,392,834.75
  5. Step 5: Solve for x
    x = 617,392,834.75/21,763.52
  6. Step 6: Final answer
    x = 28,368.24

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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.