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Finding the Fourth Proportional to 18,981.52, 28,482.12 and 13,470.32

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Solution

The fourth proportional to 18,981.52, 28,482.12 and 13,470.32 is: 20,212.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.52 : 28,482.12 = 13,470.32 : x
  2. Step 2: Convert to fraction form
    18,981.52/28,482.12 = 13,470.32/x
  3. Step 3: Cross multiply
    18,981.52x = 28,482.12 × 13,470.32
  4. Step 4: Simplify right side
    18,981.52x = 383,663,270.68
  5. Step 5: Solve for x
    x = 383,663,270.68/18,981.52
  6. Step 6: Final answer
    x = 20,212.46

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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.