Home / 7,139.38-10,706.40-2,458.08

Finding the Fourth Proportional to 7,139.38, 10,706.40 and 2,458.08

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Solution

The fourth proportional to 7,139.38, 10,706.40 and 2,458.08 is: 3,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.38 : 10,706.40 = 2,458.08 : x
  2. Step 2: Convert to fraction form
    7,139.38/10,706.40 = 2,458.08/x
  3. Step 3: Cross multiply
    7,139.38x = 10,706.40 × 2,458.08
  4. Step 4: Simplify right side
    7,139.38x = 26,317,187.71
  5. Step 5: Solve for x
    x = 26,317,187.71/7,139.38
  6. Step 6: Final answer
    x = 3,686.20

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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.