Home / 28,820.28-39,787.02-20,456.76

Finding the Fourth Proportional to 28,820.28, 39,787.02 and 20,456.76

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Solution

The fourth proportional to 28,820.28, 39,787.02 and 20,456.76 is: 28,241.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,820.28 : 39,787.02 = 20,456.76 : x
  2. Step 2: Convert to fraction form
    28,820.28/39,787.02 = 20,456.76/x
  3. Step 3: Cross multiply
    28,820.28x = 39,787.02 × 20,456.76
  4. Step 4: Simplify right side
    28,820.28x = 813,913,519.26
  5. Step 5: Solve for x
    x = 813,913,519.26/28,820.28
  6. Step 6: Final answer
    x = 28,241.00

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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.