Home / 10,342.40-15,513.60-6,405.80

Finding the Fourth Proportional to 10,342.40, 15,513.60 and 6,405.80

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Solution

The fourth proportional to 10,342.40, 15,513.60 and 6,405.80 is: 9,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,342.40 : 15,513.60 = 6,405.80 : x
  2. Step 2: Convert to fraction form
    10,342.40/15,513.60 = 6,405.80/x
  3. Step 3: Cross multiply
    10,342.40x = 15,513.60 × 6,405.80
  4. Step 4: Simplify right side
    10,342.40x = 99,377,018.88
  5. Step 5: Solve for x
    x = 99,377,018.88/10,342.40
  6. Step 6: Final answer
    x = 9,608.70

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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.