Home / 21,689.04-29,919.30-13,193.76

Finding the Fourth Proportional to 21,689.04, 29,919.30 and 13,193.76

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Solution

The fourth proportional to 21,689.04, 29,919.30 and 13,193.76 is: 18,200.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689.04 : 29,919.30 = 13,193.76 : x
  2. Step 2: Convert to fraction form
    21,689.04/29,919.30 = 13,193.76/x
  3. Step 3: Cross multiply
    21,689.04x = 29,919.30 × 13,193.76
  4. Step 4: Simplify right side
    21,689.04x = 394,748,063.57
  5. Step 5: Solve for x
    x = 394,748,063.57/21,689.04
  6. Step 6: Final answer
    x = 18,200.35

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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.