Home / 10,145.60-15,218.40-7,359.20

Finding the Fourth Proportional to 10,145.60, 15,218.40 and 7,359.20

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Solution

The fourth proportional to 10,145.60, 15,218.40 and 7,359.20 is: 11,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,145.60 : 15,218.40 = 7,359.20 : x
  2. Step 2: Convert to fraction form
    10,145.60/15,218.40 = 7,359.20/x
  3. Step 3: Cross multiply
    10,145.60x = 15,218.40 × 7,359.20
  4. Step 4: Simplify right side
    10,145.60x = 111,995,249.28
  5. Step 5: Solve for x
    x = 111,995,249.28/10,145.60
  6. Step 6: Final answer
    x = 11,038.80

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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.