Home / 20,320.88-28,027.08-15,528.92

Finding the Fourth Proportional to 20,320.88, 28,027.08 and 15,528.92

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Solution

The fourth proportional to 20,320.88, 28,027.08 and 15,528.92 is: 21,417.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.88 : 28,027.08 = 15,528.92 : x
  2. Step 2: Convert to fraction form
    20,320.88/28,027.08 = 15,528.92/x
  3. Step 3: Cross multiply
    20,320.88x = 28,027.08 × 15,528.92
  4. Step 4: Simplify right side
    20,320.88x = 435,230,143.02
  5. Step 5: Solve for x
    x = 435,230,143.02/20,320.88
  6. Step 6: Final answer
    x = 21,417.88

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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.