Home / 28,915.78-43,377.90-12,275.80

Finding the Fourth Proportional to 28,915.78, 43,377.90 and 12,275.80

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Solution

The fourth proportional to 28,915.78, 43,377.90 and 12,275.80 is: 18,415.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.78 : 43,377.90 = 12,275.80 : x
  2. Step 2: Convert to fraction form
    28,915.78/43,377.90 = 12,275.80/x
  3. Step 3: Cross multiply
    28,915.78x = 43,377.90 × 12,275.80
  4. Step 4: Simplify right side
    28,915.78x = 532,498,424.82
  5. Step 5: Solve for x
    x = 532,498,424.82/28,915.78
  6. Step 6: Final answer
    x = 18,415.50

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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.