Home / 11,385.64-15,721.51-7,842.70

Finding the Fourth Proportional to 11,385.64, 15,721.51 and 7,842.70

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Solution

The fourth proportional to 11,385.64, 15,721.51 and 7,842.70 is: 10,829.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.64 : 15,721.51 = 7,842.70 : x
  2. Step 2: Convert to fraction form
    11,385.64/15,721.51 = 7,842.70/x
  3. Step 3: Cross multiply
    11,385.64x = 15,721.51 × 7,842.70
  4. Step 4: Simplify right side
    11,385.64x = 123,299,007.87
  5. Step 5: Solve for x
    x = 123,299,007.87/11,385.64
  6. Step 6: Final answer
    x = 10,829.35

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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.