Home / 25,780.40-38,648.10-9,996.20

Finding the Fourth Proportional to 25,780.40, 38,648.10 and 9,996.20

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Solution

The fourth proportional to 25,780.40, 38,648.10 and 9,996.20 is: 14,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,780.40 : 38,648.10 = 9,996.20 : x
  2. Step 2: Convert to fraction form
    25,780.40/38,648.10 = 9,996.20/x
  3. Step 3: Cross multiply
    25,780.40x = 38,648.10 × 9,996.20
  4. Step 4: Simplify right side
    25,780.40x = 386,334,137.22
  5. Step 5: Solve for x
    x = 386,334,137.22/25,780.40
  6. Step 6: Final answer
    x = 14,985.58

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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.