Home / 8,989.15-12,403.56-5,211.58

Finding the Fourth Proportional to 8,989.15, 12,403.56 and 5,211.58

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Solution

The fourth proportional to 8,989.15, 12,403.56 and 5,211.58 is: 7,191.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.15 : 12,403.56 = 5,211.58 : x
  2. Step 2: Convert to fraction form
    8,989.15/12,403.56 = 5,211.58/x
  3. Step 3: Cross multiply
    8,989.15x = 12,403.56 × 5,211.58
  4. Step 4: Simplify right side
    8,989.15x = 64,642,145.22
  5. Step 5: Solve for x
    x = 64,642,145.22/8,989.15
  6. Step 6: Final answer
    x = 7,191.13

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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.