Home / 20,531.40-28,333.46-12,981.14

Finding the Fourth Proportional to 20,531.40, 28,333.46 and 12,981.14

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Solution

The fourth proportional to 20,531.40, 28,333.46 and 12,981.14 is: 17,914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.40 : 28,333.46 = 12,981.14 : x
  2. Step 2: Convert to fraction form
    20,531.40/28,333.46 = 12,981.14/x
  3. Step 3: Cross multiply
    20,531.40x = 28,333.46 × 12,981.14
  4. Step 4: Simplify right side
    20,531.40x = 367,800,501.73
  5. Step 5: Solve for x
    x = 367,800,501.73/20,531.40
  6. Step 6: Final answer
    x = 17,914.05

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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.