Home / 15,702.28-21,671.22-10,129.48

Finding the Fourth Proportional to 15,702.28, 21,671.22 and 10,129.48

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Solution

The fourth proportional to 15,702.28, 21,671.22 and 10,129.48 is: 13,980.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,702.28 : 21,671.22 = 10,129.48 : x
  2. Step 2: Convert to fraction form
    15,702.28/21,671.22 = 10,129.48/x
  3. Step 3: Cross multiply
    15,702.28x = 21,671.22 × 10,129.48
  4. Step 4: Simplify right side
    15,702.28x = 219,518,189.57
  5. Step 5: Solve for x
    x = 219,518,189.57/15,702.28
  6. Step 6: Final answer
    x = 13,980.02

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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.