Home / 18,970.32-28,432.16-13,425.24

Finding the Fourth Proportional to 18,970.32, 28,432.16 and 13,425.24

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Solution

The fourth proportional to 18,970.32, 28,432.16 and 13,425.24 is: 20,121.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.32 : 28,432.16 = 13,425.24 : x
  2. Step 2: Convert to fraction form
    18,970.32/28,432.16 = 13,425.24/x
  3. Step 3: Cross multiply
    18,970.32x = 28,432.16 × 13,425.24
  4. Step 4: Simplify right side
    18,970.32x = 381,708,463.12
  5. Step 5: Solve for x
    x = 381,708,463.12/18,970.32
  6. Step 6: Final answer
    x = 20,121.36

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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.