Home / 8,442.08-11,632.56-7,178.72

Finding the Fourth Proportional to 8,442.08, 11,632.56 and 7,178.72

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Solution

The fourth proportional to 8,442.08, 11,632.56 and 7,178.72 is: 9,891.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,442.08 : 11,632.56 = 7,178.72 : x
  2. Step 2: Convert to fraction form
    8,442.08/11,632.56 = 7,178.72/x
  3. Step 3: Cross multiply
    8,442.08x = 11,632.56 × 7,178.72
  4. Step 4: Simplify right side
    8,442.08x = 83,506,891.12
  5. Step 5: Solve for x
    x = 83,506,891.12/8,442.08
  6. Step 6: Final answer
    x = 9,891.74

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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.