Home / 28,179.06-38,885.55-15,603

Finding the Fourth Proportional to 28,179.06, 38,885.55 and 15,603

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Solution

The fourth proportional to 28,179.06, 38,885.55 and 15,603 is: 21,531.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,179.06 : 38,885.55 = 15,603 : x
  2. Step 2: Convert to fraction form
    28,179.06/38,885.55 = 15,603/x
  3. Step 3: Cross multiply
    28,179.06x = 38,885.55 × 15,603
  4. Step 4: Simplify right side
    28,179.06x = 606,731,236.65
  5. Step 5: Solve for x
    x = 606,731,236.65/28,179.06
  6. Step 6: Final answer
    x = 21,531.28

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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.