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Finding the Fourth Proportional to 25,760.40, 38,671.80 and 16,400.40

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Solution

The fourth proportional to 25,760.40, 38,671.80 and 16,400.40 is: 24,620.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,760.40 : 38,671.80 = 16,400.40 : x
  2. Step 2: Convert to fraction form
    25,760.40/38,671.80 = 16,400.40/x
  3. Step 3: Cross multiply
    25,760.40x = 38,671.80 × 16,400.40
  4. Step 4: Simplify right side
    25,760.40x = 634,232,988.72
  5. Step 5: Solve for x
    x = 634,232,988.72/25,760.40
  6. Step 6: Final answer
    x = 24,620.46

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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.