Home / 20,994.32-31,337.88-18,503.28

Finding the Fourth Proportional to 20,994.32, 31,337.88 and 18,503.28

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Solution

The fourth proportional to 20,994.32, 31,337.88 and 18,503.28 is: 27,619.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.32 : 31,337.88 = 18,503.28 : x
  2. Step 2: Convert to fraction form
    20,994.32/31,337.88 = 18,503.28/x
  3. Step 3: Cross multiply
    20,994.32x = 31,337.88 × 18,503.28
  4. Step 4: Simplify right side
    20,994.32x = 579,853,568.25
  5. Step 5: Solve for x
    x = 579,853,568.25/20,994.32
  6. Step 6: Final answer
    x = 27,619.55

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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.