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Finding the Fourth Proportional to 31,050, 42,859.80 and 18,474.48

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Solution

The fourth proportional to 31,050, 42,859.80 and 18,474.48 is: 25,501.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,050 : 42,859.80 = 18,474.48 : x
  2. Step 2: Convert to fraction form
    31,050/42,859.80 = 18,474.48/x
  3. Step 3: Cross multiply
    31,050x = 42,859.80 × 18,474.48
  4. Step 4: Simplify right side
    31,050x = 791,812,517.90
  5. Step 5: Solve for x
    x = 791,812,517.90/31,050
  6. Step 6: Final answer
    x = 25,501.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.