Home / 20,863.60-31,094.67-20,531.45

Finding the Fourth Proportional to 20,863.60, 31,094.67 and 20,531.45

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Solution

The fourth proportional to 20,863.60, 31,094.67 and 20,531.45 is: 30,599.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.60 : 31,094.67 = 20,531.45 : x
  2. Step 2: Convert to fraction form
    20,863.60/31,094.67 = 20,531.45/x
  3. Step 3: Cross multiply
    20,863.60x = 31,094.67 × 20,531.45
  4. Step 4: Simplify right side
    20,863.60x = 638,418,701.61
  5. Step 5: Solve for x
    x = 638,418,701.61/20,863.60
  6. Step 6: Final answer
    x = 30,599.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.