Home / 8,987.71-12,403.70-5,211.85

Finding the Fourth Proportional to 8,987.71, 12,403.70 and 5,211.85

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Solution

The fourth proportional to 8,987.71, 12,403.70 and 5,211.85 is: 7,192.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.71 : 12,403.70 = 5,211.85 : x
  2. Step 2: Convert to fraction form
    8,987.71/12,403.70 = 5,211.85/x
  3. Step 3: Cross multiply
    8,987.71x = 12,403.70 × 5,211.85
  4. Step 4: Simplify right side
    8,987.71x = 64,646,223.85
  5. Step 5: Solve for x
    x = 64,646,223.85/8,987.71
  6. Step 6: Final answer
    x = 7,192.74

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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.