Home / 31,302.60-43,209.36-20,706.72

Finding the Fourth Proportional to 31,302.60, 43,209.36 and 20,706.72

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Solution

The fourth proportional to 31,302.60, 43,209.36 and 20,706.72 is: 28,583.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,302.60 : 43,209.36 = 20,706.72 : x
  2. Step 2: Convert to fraction form
    31,302.60/43,209.36 = 20,706.72/x
  3. Step 3: Cross multiply
    31,302.60x = 43,209.36 × 20,706.72
  4. Step 4: Simplify right side
    31,302.60x = 894,724,118.90
  5. Step 5: Solve for x
    x = 894,724,118.90/31,302.60
  6. Step 6: Final answer
    x = 28,583.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.