Home / 8,989.31-12,405.21-5,214.66

Finding the Fourth Proportional to 8,989.31, 12,405.21 and 5,214.66

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Solution

The fourth proportional to 8,989.31, 12,405.21 and 5,214.66 is: 7,196.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.31 : 12,405.21 = 5,214.66 : x
  2. Step 2: Convert to fraction form
    8,989.31/12,405.21 = 5,214.66/x
  3. Step 3: Cross multiply
    8,989.31x = 12,405.21 × 5,214.66
  4. Step 4: Simplify right side
    8,989.31x = 64,688,952.38
  5. Step 5: Solve for x
    x = 64,688,952.38/8,989.31
  6. Step 6: Final answer
    x = 7,196.21

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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.