Home / 20,870.17-31,308.90-9,183.08

Finding the Fourth Proportional to 20,870.17, 31,308.90 and 9,183.08

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Solution

The fourth proportional to 20,870.17, 31,308.90 and 9,183.08 is: 13,776.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.17 : 31,308.90 = 9,183.08 : x
  2. Step 2: Convert to fraction form
    20,870.17/31,308.90 = 9,183.08/x
  3. Step 3: Cross multiply
    20,870.17x = 31,308.90 × 9,183.08
  4. Step 4: Simplify right side
    20,870.17x = 287,512,211.68
  5. Step 5: Solve for x
    x = 287,512,211.68/20,870.17
  6. Step 6: Final answer
    x = 13,776.23

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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.