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Finding the Fourth Proportional to 10,176.80, 15,246.06 and 7,978.86

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Solution

The fourth proportional to 10,176.80, 15,246.06 and 7,978.86 is: 11,953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,176.80 : 15,246.06 = 7,978.86 : x
  2. Step 2: Convert to fraction form
    10,176.80/15,246.06 = 7,978.86/x
  3. Step 3: Cross multiply
    10,176.80x = 15,246.06 × 7,978.86
  4. Step 4: Simplify right side
    10,176.80x = 121,646,178.29
  5. Step 5: Solve for x
    x = 121,646,178.29/10,176.80
  6. Step 6: Final answer
    x = 11,953.28

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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.