Home / 15,499.04-21,388.38-8,425.40

Finding the Fourth Proportional to 15,499.04, 21,388.38 and 8,425.40

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Solution

The fourth proportional to 15,499.04, 21,388.38 and 8,425.40 is: 11,626.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,499.04 : 21,388.38 = 8,425.40 : x
  2. Step 2: Convert to fraction form
    15,499.04/21,388.38 = 8,425.40/x
  3. Step 3: Cross multiply
    15,499.04x = 21,388.38 × 8,425.40
  4. Step 4: Simplify right side
    15,499.04x = 180,205,656.85
  5. Step 5: Solve for x
    x = 180,205,656.85/15,499.04
  6. Step 6: Final answer
    x = 11,626.89

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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.