Home / 20,529.12-28,346.40-15,280.32

Finding the Fourth Proportional to 20,529.12, 28,346.40 and 15,280.32

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Solution

The fourth proportional to 20,529.12, 28,346.40 and 15,280.32 is: 21,098.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.12 : 28,346.40 = 15,280.32 : x
  2. Step 2: Convert to fraction form
    20,529.12/28,346.40 = 15,280.32/x
  3. Step 3: Cross multiply
    20,529.12x = 28,346.40 × 15,280.32
  4. Step 4: Simplify right side
    20,529.12x = 433,142,062.85
  5. Step 5: Solve for x
    x = 433,142,062.85/20,529.12
  6. Step 6: Final answer
    x = 21,098.91

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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.