Home / 15,419.56-21,280.02-8,702.80

Finding the Fourth Proportional to 15,419.56, 21,280.02 and 8,702.80

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Solution

The fourth proportional to 15,419.56, 21,280.02 and 8,702.80 is: 12,010.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.56 : 21,280.02 = 8,702.80 : x
  2. Step 2: Convert to fraction form
    15,419.56/21,280.02 = 8,702.80/x
  3. Step 3: Cross multiply
    15,419.56x = 21,280.02 × 8,702.80
  4. Step 4: Simplify right side
    15,419.56x = 185,195,758.06
  5. Step 5: Solve for x
    x = 185,195,758.06/15,419.56
  6. Step 6: Final answer
    x = 12,010.44

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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.