Home / 13,531.80-20,307.98-10,905.72

Finding the Fourth Proportional to 13,531.80, 20,307.98 and 10,905.72

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Solution

The fourth proportional to 13,531.80, 20,307.98 and 10,905.72 is: 16,366.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,531.80 : 20,307.98 = 10,905.72 : x
  2. Step 2: Convert to fraction form
    13,531.80/20,307.98 = 10,905.72/x
  3. Step 3: Cross multiply
    13,531.80x = 20,307.98 × 10,905.72
  4. Step 4: Simplify right side
    13,531.80x = 221,473,143.65
  5. Step 5: Solve for x
    x = 221,473,143.65/13,531.80
  6. Step 6: Final answer
    x = 16,366.86

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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.