Home / 18,720.64-28,076.16-5,569.92

Finding the Fourth Proportional to 18,720.64, 28,076.16 and 5,569.92

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Solution

The fourth proportional to 18,720.64, 28,076.16 and 5,569.92 is: 8,353.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.64 : 28,076.16 = 5,569.92 : x
  2. Step 2: Convert to fraction form
    18,720.64/28,076.16 = 5,569.92/x
  3. Step 3: Cross multiply
    18,720.64x = 28,076.16 × 5,569.92
  4. Step 4: Simplify right side
    18,720.64x = 156,381,965.11
  5. Step 5: Solve for x
    x = 156,381,965.11/18,720.64
  6. Step 6: Final answer
    x = 8,353.45

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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.