Home / 20,987.82-31,501.17-10,606.86

Finding the Fourth Proportional to 20,987.82, 31,501.17 and 10,606.86

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Solution

The fourth proportional to 20,987.82, 31,501.17 and 10,606.86 is: 15,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.82 : 31,501.17 = 10,606.86 : x
  2. Step 2: Convert to fraction form
    20,987.82/31,501.17 = 10,606.86/x
  3. Step 3: Cross multiply
    20,987.82x = 31,501.17 × 10,606.86
  4. Step 4: Simplify right side
    20,987.82x = 334,128,500.03
  5. Step 5: Solve for x
    x = 334,128,500.03/20,987.82
  6. Step 6: Final answer
    x = 15,920.11

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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.