Home / 21,780.04-32,641.26-7,915.72

Finding the Fourth Proportional to 21,780.04, 32,641.26 and 7,915.72

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Solution

The fourth proportional to 21,780.04, 32,641.26 and 7,915.72 is: 11,863.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.04 : 32,641.26 = 7,915.72 : x
  2. Step 2: Convert to fraction form
    21,780.04/32,641.26 = 7,915.72/x
  3. Step 3: Cross multiply
    21,780.04x = 32,641.26 × 7,915.72
  4. Step 4: Simplify right side
    21,780.04x = 258,379,074.61
  5. Step 5: Solve for x
    x = 258,379,074.61/21,780.04
  6. Step 6: Final answer
    x = 11,863.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.