Home / 42,728.81-64,049.46-21,629.72

Finding the Fourth Proportional to 42,728.81, 64,049.46 and 21,629.72

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Solution

The fourth proportional to 42,728.81, 64,049.46 and 21,629.72 is: 32,422.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,728.81 : 64,049.46 = 21,629.72 : x
  2. Step 2: Convert to fraction form
    42,728.81/64,049.46 = 21,629.72/x
  3. Step 3: Cross multiply
    42,728.81x = 64,049.46 × 21,629.72
  4. Step 4: Simplify right side
    42,728.81x = 1,385,371,565.70
  5. Step 5: Solve for x
    x = 1,385,371,565.70/42,728.81
  6. Step 6: Final answer
    x = 32,422.43

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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.