Home / 18,960.40-28,440.33-8,572.15

Finding the Fourth Proportional to 18,960.40, 28,440.33 and 8,572.15

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Solution

The fourth proportional to 18,960.40, 28,440.33 and 8,572.15 is: 12,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.40 : 28,440.33 = 8,572.15 : x
  2. Step 2: Convert to fraction form
    18,960.40/28,440.33 = 8,572.15/x
  3. Step 3: Cross multiply
    18,960.40x = 28,440.33 × 8,572.15
  4. Step 4: Simplify right side
    18,960.40x = 243,794,774.81
  5. Step 5: Solve for x
    x = 243,794,774.81/18,960.40
  6. Step 6: Final answer
    x = 12,858.10

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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.