Home / 11,178.89-15,421.55-8,036.90

Finding the Fourth Proportional to 11,178.89, 15,421.55 and 8,036.90

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Solution

The fourth proportional to 11,178.89, 15,421.55 and 8,036.90 is: 11,087.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,178.89 : 15,421.55 = 8,036.90 : x
  2. Step 2: Convert to fraction form
    11,178.89/15,421.55 = 8,036.90/x
  3. Step 3: Cross multiply
    11,178.89x = 15,421.55 × 8,036.90
  4. Step 4: Simplify right side
    11,178.89x = 123,941,337.90
  5. Step 5: Solve for x
    x = 123,941,337.90/11,178.89
  6. Step 6: Final answer
    x = 11,087.09

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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.