Home / 28,257.60-42,386.88-12,245.76

Finding the Fourth Proportional to 28,257.60, 42,386.88 and 12,245.76

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Solution

The fourth proportional to 28,257.60, 42,386.88 and 12,245.76 is: 18,368.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.60 : 42,386.88 = 12,245.76 : x
  2. Step 2: Convert to fraction form
    28,257.60/42,386.88 = 12,245.76/x
  3. Step 3: Cross multiply
    28,257.60x = 42,386.88 × 12,245.76
  4. Step 4: Simplify right side
    28,257.60x = 519,059,559.63
  5. Step 5: Solve for x
    x = 519,059,559.63/28,257.60
  6. Step 6: Final answer
    x = 18,368.85

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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.