Home / 15,117.19-20,860.82-8,402.58

Finding the Fourth Proportional to 15,117.19, 20,860.82 and 8,402.58

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Solution

The fourth proportional to 15,117.19, 20,860.82 and 8,402.58 is: 11,595.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.19 : 20,860.82 = 8,402.58 : x
  2. Step 2: Convert to fraction form
    15,117.19/20,860.82 = 8,402.58/x
  3. Step 3: Cross multiply
    15,117.19x = 20,860.82 × 8,402.58
  4. Step 4: Simplify right side
    15,117.19x = 175,284,666.90
  5. Step 5: Solve for x
    x = 175,284,666.90/15,117.19
  6. Step 6: Final answer
    x = 11,595.06

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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.