Home / 28,316.94-42,435.12-20,862.78

Finding the Fourth Proportional to 28,316.94, 42,435.12 and 20,862.78

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Solution

The fourth proportional to 28,316.94, 42,435.12 and 20,862.78 is: 31,264.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.94 : 42,435.12 = 20,862.78 : x
  2. Step 2: Convert to fraction form
    28,316.94/42,435.12 = 20,862.78/x
  3. Step 3: Cross multiply
    28,316.94x = 42,435.12 × 20,862.78
  4. Step 4: Simplify right side
    28,316.94x = 885,314,572.83
  5. Step 5: Solve for x
    x = 885,314,572.83/28,316.94
  6. Step 6: Final answer
    x = 31,264.49

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1.5x scale

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.