Home / 21,521.67-29,702.21-12,572.08

Finding the Fourth Proportional to 21,521.67, 29,702.21 and 12,572.08

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Solution

The fourth proportional to 21,521.67, 29,702.21 and 12,572.08 is: 17,350.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.67 : 29,702.21 = 12,572.08 : x
  2. Step 2: Convert to fraction form
    21,521.67/29,702.21 = 12,572.08/x
  3. Step 3: Cross multiply
    21,521.67x = 29,702.21 × 12,572.08
  4. Step 4: Simplify right side
    21,521.67x = 373,418,560.30
  5. Step 5: Solve for x
    x = 373,418,560.30/21,521.67
  6. Step 6: Final answer
    x = 17,350.82

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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.