Home / 12,920.85-17,833.10-7,615.35

Finding the Fourth Proportional to 12,920.85, 17,833.10 and 7,615.35

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Solution

The fourth proportional to 12,920.85, 17,833.10 and 7,615.35 is: 10,510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.85 : 17,833.10 = 7,615.35 : x
  2. Step 2: Convert to fraction form
    12,920.85/17,833.10 = 7,615.35/x
  3. Step 3: Cross multiply
    12,920.85x = 17,833.10 × 7,615.35
  4. Step 4: Simplify right side
    12,920.85x = 135,805,260.01
  5. Step 5: Solve for x
    x = 135,805,260.01/12,920.85
  6. Step 6: Final answer
    x = 10,510.55

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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.