Home / 42,915.20-59,220-28,765.76

Finding the Fourth Proportional to 42,915.20, 59,220 and 28,765.76

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Solution

The fourth proportional to 42,915.20, 59,220 and 28,765.76 is: 39,694.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,915.20 : 59,220 = 28,765.76 : x
  2. Step 2: Convert to fraction form
    42,915.20/59,220 = 28,765.76/x
  3. Step 3: Cross multiply
    42,915.20x = 59,220 × 28,765.76
  4. Step 4: Simplify right side
    42,915.20x = 1,703,508,307.20
  5. Step 5: Solve for x
    x = 1,703,508,307.20/42,915.20
  6. Step 6: Final answer
    x = 39,694.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.