Home / 15,405.60-23,108.40-12,999.90

Finding the Fourth Proportional to 15,405.60, 23,108.40 and 12,999.90

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Solution

The fourth proportional to 15,405.60, 23,108.40 and 12,999.90 is: 19,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.60 : 23,108.40 = 12,999.90 : x
  2. Step 2: Convert to fraction form
    15,405.60/23,108.40 = 12,999.90/x
  3. Step 3: Cross multiply
    15,405.60x = 23,108.40 × 12,999.90
  4. Step 4: Simplify right side
    15,405.60x = 300,406,889.16
  5. Step 5: Solve for x
    x = 300,406,889.16/15,405.60
  6. Step 6: Final answer
    x = 19,499.85

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.