Home / 28,085.32-42,123.12-15,403.60

Finding the Fourth Proportional to 28,085.32, 42,123.12 and 15,403.60

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Solution

The fourth proportional to 28,085.32, 42,123.12 and 15,403.60 is: 23,102.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.32 : 42,123.12 = 15,403.60 : x
  2. Step 2: Convert to fraction form
    28,085.32/42,123.12 = 15,403.60/x
  3. Step 3: Cross multiply
    28,085.32x = 42,123.12 × 15,403.60
  4. Step 4: Simplify right side
    28,085.32x = 648,847,691.23
  5. Step 5: Solve for x
    x = 648,847,691.23/28,085.32
  6. Step 6: Final answer
    x = 23,102.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.