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Finding the Fourth Proportional to 25,862.94, 38,813.94 and 20,730.78

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Solution

The fourth proportional to 25,862.94, 38,813.94 and 20,730.78 is: 31,111.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,862.94 : 38,813.94 = 20,730.78 : x
  2. Step 2: Convert to fraction form
    25,862.94/38,813.94 = 20,730.78/x
  3. Step 3: Cross multiply
    25,862.94x = 38,813.94 × 20,730.78
  4. Step 4: Simplify right side
    25,862.94x = 804,643,251.07
  5. Step 5: Solve for x
    x = 804,643,251.07/25,862.94
  6. Step 6: Final answer
    x = 31,111.82

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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.