Home / 28,158.60-42,235.74-7,381.56

Finding the Fourth Proportional to 28,158.60, 42,235.74 and 7,381.56

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Solution

The fourth proportional to 28,158.60, 42,235.74 and 7,381.56 is: 11,071.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.60 : 42,235.74 = 7,381.56 : x
  2. Step 2: Convert to fraction form
    28,158.60/42,235.74 = 7,381.56/x
  3. Step 3: Cross multiply
    28,158.60x = 42,235.74 × 7,381.56
  4. Step 4: Simplify right side
    28,158.60x = 311,765,648.95
  5. Step 5: Solve for x
    x = 311,765,648.95/28,158.60
  6. Step 6: Final answer
    x = 11,071.77

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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.