Home / 20,780.10-31,160.06-9,684.18

Finding the Fourth Proportional to 20,780.10, 31,160.06 and 9,684.18

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Solution

The fourth proportional to 20,780.10, 31,160.06 and 9,684.18 is: 14,521.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.10 : 31,160.06 = 9,684.18 : x
  2. Step 2: Convert to fraction form
    20,780.10/31,160.06 = 9,684.18/x
  3. Step 3: Cross multiply
    20,780.10x = 31,160.06 × 9,684.18
  4. Step 4: Simplify right side
    20,780.10x = 301,759,629.85
  5. Step 5: Solve for x
    x = 301,759,629.85/20,780.10
  6. Step 6: Final answer
    x = 14,521.57

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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.