Home / 15,209.21-20,987.66-8,402.94

Finding the Fourth Proportional to 15,209.21, 20,987.66 and 8,402.94

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Solution

The fourth proportional to 15,209.21, 20,987.66 and 8,402.94 is: 11,595.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,209.21 : 20,987.66 = 8,402.94 : x
  2. Step 2: Convert to fraction form
    15,209.21/20,987.66 = 8,402.94/x
  3. Step 3: Cross multiply
    15,209.21x = 20,987.66 × 8,402.94
  4. Step 4: Simplify right side
    15,209.21x = 176,358,068.73
  5. Step 5: Solve for x
    x = 176,358,068.73/15,209.21
  6. Step 6: Final answer
    x = 11,595.48

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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.