Home / 15,352.56-21,186.36-8,638.20

Finding the Fourth Proportional to 15,352.56, 21,186.36 and 8,638.20

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Solution

The fourth proportional to 15,352.56, 21,186.36 and 8,638.20 is: 11,920.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,352.56 : 21,186.36 = 8,638.20 : x
  2. Step 2: Convert to fraction form
    15,352.56/21,186.36 = 8,638.20/x
  3. Step 3: Cross multiply
    15,352.56x = 21,186.36 × 8,638.20
  4. Step 4: Simplify right side
    15,352.56x = 183,012,014.95
  5. Step 5: Solve for x
    x = 183,012,014.95/15,352.56
  6. Step 6: Final answer
    x = 11,920.62

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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.