Home / 21,521.80-29,701.94-12,572.18

Finding the Fourth Proportional to 21,521.80, 29,701.94 and 12,572.18

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Solution

The fourth proportional to 21,521.80, 29,701.94 and 12,572.18 is: 17,350.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.80 : 29,701.94 = 12,572.18 : x
  2. Step 2: Convert to fraction form
    21,521.80/29,701.94 = 12,572.18/x
  3. Step 3: Cross multiply
    21,521.80x = 29,701.94 × 12,572.18
  4. Step 4: Simplify right side
    21,521.80x = 373,418,106.76
  5. Step 5: Solve for x
    x = 373,418,106.76/21,521.80
  6. Step 6: Final answer
    x = 17,350.69

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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.