Home / 28,211.12-38,929.80-15,635.12

Finding the Fourth Proportional to 28,211.12, 38,929.80 and 15,635.12

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Solution

The fourth proportional to 28,211.12, 38,929.80 and 15,635.12 is: 21,575.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.12 : 38,929.80 = 15,635.12 : x
  2. Step 2: Convert to fraction form
    28,211.12/38,929.80 = 15,635.12/x
  3. Step 3: Cross multiply
    28,211.12x = 38,929.80 × 15,635.12
  4. Step 4: Simplify right side
    28,211.12x = 608,672,094.58
  5. Step 5: Solve for x
    x = 608,672,094.58/28,211.12
  6. Step 6: Final answer
    x = 21,575.61

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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.