Home / 15,306.40-21,113.92-9,638.92

Finding the Fourth Proportional to 15,306.40, 21,113.92 and 9,638.92

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Solution

The fourth proportional to 15,306.40, 21,113.92 and 9,638.92 is: 13,296.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,306.40 : 21,113.92 = 9,638.92 : x
  2. Step 2: Convert to fraction form
    15,306.40/21,113.92 = 9,638.92/x
  3. Step 3: Cross multiply
    15,306.40x = 21,113.92 × 9,638.92
  4. Step 4: Simplify right side
    15,306.40x = 203,515,385.77
  5. Step 5: Solve for x
    x = 203,515,385.77/15,306.40
  6. Step 6: Final answer
    x = 13,296.10

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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.