Home / 13,120.85-18,106.20-7,152.38

Finding the Fourth Proportional to 13,120.85, 18,106.20 and 7,152.38

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Solution

The fourth proportional to 13,120.85, 18,106.20 and 7,152.38 is: 9,869.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.85 : 18,106.20 = 7,152.38 : x
  2. Step 2: Convert to fraction form
    13,120.85/18,106.20 = 7,152.38/x
  3. Step 3: Cross multiply
    13,120.85x = 18,106.20 × 7,152.38
  4. Step 4: Simplify right side
    13,120.85x = 129,502,332.23
  5. Step 5: Solve for x
    x = 129,502,332.23/13,120.85
  6. Step 6: Final answer
    x = 9,869.97

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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.