Home / 18,989.13-28,483.80-12,456.69

Finding the Fourth Proportional to 18,989.13, 28,483.80 and 12,456.69

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Solution

The fourth proportional to 18,989.13, 28,483.80 and 12,456.69 is: 18,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.13 : 28,483.80 = 12,456.69 : x
  2. Step 2: Convert to fraction form
    18,989.13/28,483.80 = 12,456.69/x
  3. Step 3: Cross multiply
    18,989.13x = 28,483.80 × 12,456.69
  4. Step 4: Simplify right side
    18,989.13x = 354,813,866.62
  5. Step 5: Solve for x
    x = 354,813,866.62/18,989.13
  6. Step 6: Final answer
    x = 18,685.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.