Home / 26,390.26-36,423.12-15,780.88

Finding the Fourth Proportional to 26,390.26, 36,423.12 and 15,780.88

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Solution

The fourth proportional to 26,390.26, 36,423.12 and 15,780.88 is: 21,780.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,390.26 : 36,423.12 = 15,780.88 : x
  2. Step 2: Convert to fraction form
    26,390.26/36,423.12 = 15,780.88/x
  3. Step 3: Cross multiply
    26,390.26x = 36,423.12 × 15,780.88
  4. Step 4: Simplify right side
    26,390.26x = 574,788,885.95
  5. Step 5: Solve for x
    x = 574,788,885.95/26,390.26
  6. Step 6: Final answer
    x = 21,780.34

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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.