Home / 11,507.28-15,878.89-6,470.70

Finding the Fourth Proportional to 11,507.28, 15,878.89 and 6,470.70

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Solution

The fourth proportional to 11,507.28, 15,878.89 and 6,470.70 is: 8,928.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,507.28 : 15,878.89 = 6,470.70 : x
  2. Step 2: Convert to fraction form
    11,507.28/15,878.89 = 6,470.70/x
  3. Step 3: Cross multiply
    11,507.28x = 15,878.89 × 6,470.70
  4. Step 4: Simplify right side
    11,507.28x = 102,747,421.78
  5. Step 5: Solve for x
    x = 102,747,421.78/11,507.28
  6. Step 6: Final answer
    x = 8,928.91

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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.