Home / 25,128.78-34,677.84-15,702.78

Finding the Fourth Proportional to 25,128.78, 34,677.84 and 15,702.78

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Solution

The fourth proportional to 25,128.78, 34,677.84 and 15,702.78 is: 21,669.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,128.78 : 34,677.84 = 15,702.78 : x
  2. Step 2: Convert to fraction form
    25,128.78/34,677.84 = 15,702.78/x
  3. Step 3: Cross multiply
    25,128.78x = 34,677.84 × 15,702.78
  4. Step 4: Simplify right side
    25,128.78x = 544,538,492.40
  5. Step 5: Solve for x
    x = 544,538,492.40/25,128.78
  6. Step 6: Final answer
    x = 21,669.91

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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.