Home / 31,024.80-42,812.28-18,447.12

Finding the Fourth Proportional to 31,024.80, 42,812.28 and 18,447.12

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Solution

The fourth proportional to 31,024.80, 42,812.28 and 18,447.12 is: 25,455.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,024.80 : 42,812.28 = 18,447.12 : x
  2. Step 2: Convert to fraction form
    31,024.80/42,812.28 = 18,447.12/x
  3. Step 3: Cross multiply
    31,024.80x = 42,812.28 × 18,447.12
  4. Step 4: Simplify right side
    31,024.80x = 789,763,266.63
  5. Step 5: Solve for x
    x = 789,763,266.63/31,024.80
  6. Step 6: Final answer
    x = 25,455.87

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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.