Home / 7,158.13-9,871.40-5,479.61

Finding the Fourth Proportional to 7,158.13, 9,871.40 and 5,479.61

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Solution

The fourth proportional to 7,158.13, 9,871.40 and 5,479.61 is: 7,556.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,158.13 : 9,871.40 = 5,479.61 : x
  2. Step 2: Convert to fraction form
    7,158.13/9,871.40 = 5,479.61/x
  3. Step 3: Cross multiply
    7,158.13x = 9,871.40 × 5,479.61
  4. Step 4: Simplify right side
    7,158.13x = 54,091,386.50
  5. Step 5: Solve for x
    x = 54,091,386.50/7,158.13
  6. Step 6: Final answer
    x = 7,556.64

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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.