Home / 11,118.72-15,345.38-6,402.90

Finding the Fourth Proportional to 11,118.72, 15,345.38 and 6,402.90

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Solution

The fourth proportional to 11,118.72, 15,345.38 and 6,402.90 is: 8,836.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,118.72 : 15,345.38 = 6,402.90 : x
  2. Step 2: Convert to fraction form
    11,118.72/15,345.38 = 6,402.90/x
  3. Step 3: Cross multiply
    11,118.72x = 15,345.38 × 6,402.90
  4. Step 4: Simplify right side
    11,118.72x = 98,254,933.60
  5. Step 5: Solve for x
    x = 98,254,933.60/11,118.72
  6. Step 6: Final answer
    x = 8,836.89

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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.