Home / 15,499.20-21,394.38-9,211.50

Finding the Fourth Proportional to 15,499.20, 21,394.38 and 9,211.50

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Solution

The fourth proportional to 15,499.20, 21,394.38 and 9,211.50 is: 12,715.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,499.20 : 21,394.38 = 9,211.50 : x
  2. Step 2: Convert to fraction form
    15,499.20/21,394.38 = 9,211.50/x
  3. Step 3: Cross multiply
    15,499.20x = 21,394.38 × 9,211.50
  4. Step 4: Simplify right side
    15,499.20x = 197,074,331.37
  5. Step 5: Solve for x
    x = 197,074,331.37/15,499.20
  6. Step 6: Final answer
    x = 12,715.13

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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.