Home / 28,443.28-42,671.40-10,921.36

Finding the Fourth Proportional to 28,443.28, 42,671.40 and 10,921.36

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Solution

The fourth proportional to 28,443.28, 42,671.40 and 10,921.36 is: 16,384.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.28 : 42,671.40 = 10,921.36 : x
  2. Step 2: Convert to fraction form
    28,443.28/42,671.40 = 10,921.36/x
  3. Step 3: Cross multiply
    28,443.28x = 42,671.40 × 10,921.36
  4. Step 4: Simplify right side
    28,443.28x = 466,029,721.10
  5. Step 5: Solve for x
    x = 466,029,721.10/28,443.28
  6. Step 6: Final answer
    x = 16,384.53

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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.