Home / 20,868.41-31,312.74-9,180.11

Finding the Fourth Proportional to 20,868.41, 31,312.74 and 9,180.11

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Solution

The fourth proportional to 20,868.41, 31,312.74 and 9,180.11 is: 13,774.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.41 : 31,312.74 = 9,180.11 : x
  2. Step 2: Convert to fraction form
    20,868.41/31,312.74 = 9,180.11/x
  3. Step 3: Cross multiply
    20,868.41x = 31,312.74 × 9,180.11
  4. Step 4: Simplify right side
    20,868.41x = 287,454,397.60
  5. Step 5: Solve for x
    x = 287,454,397.60/20,868.41
  6. Step 6: Final answer
    x = 13,774.62

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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.