Home / 21,561.30-29,743.70-12,602.95

Finding the Fourth Proportional to 21,561.30, 29,743.70 and 12,602.95

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Solution

The fourth proportional to 21,561.30, 29,743.70 and 12,602.95 is: 17,385.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.30 : 29,743.70 = 12,602.95 : x
  2. Step 2: Convert to fraction form
    21,561.30/29,743.70 = 12,602.95/x
  3. Step 3: Cross multiply
    21,561.30x = 29,743.70 × 12,602.95
  4. Step 4: Simplify right side
    21,561.30x = 374,858,215.20
  5. Step 5: Solve for x
    x = 374,858,215.20/21,561.30
  6. Step 6: Final answer
    x = 17,385.70

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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.