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Finding the Fourth Proportional to 28,587.60, 42,876.54 and 7,806.24

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Solution

The fourth proportional to 28,587.60, 42,876.54 and 7,806.24 is: 11,708.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.60 : 42,876.54 = 7,806.24 : x
  2. Step 2: Convert to fraction form
    28,587.60/42,876.54 = 7,806.24/x
  3. Step 3: Cross multiply
    28,587.60x = 42,876.54 × 7,806.24
  4. Step 4: Simplify right side
    28,587.60x = 334,704,561.61
  5. Step 5: Solve for x
    x = 334,704,561.61/28,587.60
  6. Step 6: Final answer
    x = 11,708.03

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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.