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Finding the Fourth Proportional to 28,580.96, 42,877.92 and 8,860.16

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Solution

The fourth proportional to 28,580.96, 42,877.92 and 8,860.16 is: 13,292.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,580.96 : 42,877.92 = 8,860.16 : x
  2. Step 2: Convert to fraction form
    28,580.96/42,877.92 = 8,860.16/x
  3. Step 3: Cross multiply
    28,580.96x = 42,877.92 × 8,860.16
  4. Step 4: Simplify right side
    28,580.96x = 379,905,231.67
  5. Step 5: Solve for x
    x = 379,905,231.67/28,580.96
  6. Step 6: Final answer
    x = 13,292.25

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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.