Home / 13,691.12-18,903.66-8,989.07

Finding the Fourth Proportional to 13,691.12, 18,903.66 and 8,989.07

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Solution

The fourth proportional to 13,691.12, 18,903.66 and 8,989.07 is: 12,411.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.12 : 18,903.66 = 8,989.07 : x
  2. Step 2: Convert to fraction form
    13,691.12/18,903.66 = 8,989.07/x
  3. Step 3: Cross multiply
    13,691.12x = 18,903.66 × 8,989.07
  4. Step 4: Simplify right side
    13,691.12x = 169,926,323.00
  5. Step 5: Solve for x
    x = 169,926,323.00/13,691.12
  6. Step 6: Final answer
    x = 12,411.43

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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.