Home / 28,490.85-42,702.14-13,272.90

Finding the Fourth Proportional to 28,490.85, 42,702.14 and 13,272.90

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Solution

The fourth proportional to 28,490.85, 42,702.14 and 13,272.90 is: 19,893.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.85 : 42,702.14 = 13,272.90 : x
  2. Step 2: Convert to fraction form
    28,490.85/42,702.14 = 13,272.90/x
  3. Step 3: Cross multiply
    28,490.85x = 42,702.14 × 13,272.90
  4. Step 4: Simplify right side
    28,490.85x = 566,781,234.01
  5. Step 5: Solve for x
    x = 566,781,234.01/28,490.85
  6. Step 6: Final answer
    x = 19,893.45

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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.