Home / 10,257.50-15,386.22-7,920.92

Finding the Fourth Proportional to 10,257.50, 15,386.22 and 7,920.92

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Solution

The fourth proportional to 10,257.50, 15,386.22 and 7,920.92 is: 11,881.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,257.50 : 15,386.22 = 7,920.92 : x
  2. Step 2: Convert to fraction form
    10,257.50/15,386.22 = 7,920.92/x
  3. Step 3: Cross multiply
    10,257.50x = 15,386.22 × 7,920.92
  4. Step 4: Simplify right side
    10,257.50x = 121,873,017.72
  5. Step 5: Solve for x
    x = 121,873,017.72/10,257.50
  6. Step 6: Final answer
    x = 11,881.36

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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.