Home / 20,953.50-28,915.83-12,572.70

Finding the Fourth Proportional to 20,953.50, 28,915.83 and 12,572.70

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Solution

The fourth proportional to 20,953.50, 28,915.83 and 12,572.70 is: 17,350.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.50 : 28,915.83 = 12,572.70 : x
  2. Step 2: Convert to fraction form
    20,953.50/28,915.83 = 12,572.70/x
  3. Step 3: Cross multiply
    20,953.50x = 28,915.83 × 12,572.70
  4. Step 4: Simplify right side
    20,953.50x = 363,550,055.84
  5. Step 5: Solve for x
    x = 363,550,055.84/20,953.50
  6. Step 6: Final answer
    x = 17,350.33

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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.