Home / 31,041.77-42,787.85-20,966.99

Finding the Fourth Proportional to 31,041.77, 42,787.85 and 20,966.99

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Solution

The fourth proportional to 31,041.77, 42,787.85 and 20,966.99 is: 28,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,041.77 : 42,787.85 = 20,966.99 : x
  2. Step 2: Convert to fraction form
    31,041.77/42,787.85 = 20,966.99/x
  3. Step 3: Cross multiply
    31,041.77x = 42,787.85 × 20,966.99
  4. Step 4: Simplify right side
    31,041.77x = 897,132,104.30
  5. Step 5: Solve for x
    x = 897,132,104.30/31,041.77
  6. Step 6: Final answer
    x = 28,900.81

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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.