Home / 21,377.20-31,909.25-18,852.18

Finding the Fourth Proportional to 21,377.20, 31,909.25 and 18,852.18

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Solution

The fourth proportional to 21,377.20, 31,909.25 and 18,852.18 is: 28,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,377.20 : 31,909.25 = 18,852.18 : x
  2. Step 2: Convert to fraction form
    21,377.20/31,909.25 = 18,852.18/x
  3. Step 3: Cross multiply
    21,377.20x = 31,909.25 × 18,852.18
  4. Step 4: Simplify right side
    21,377.20x = 601,558,765.12
  5. Step 5: Solve for x
    x = 601,558,765.12/21,377.20
  6. Step 6: Final answer
    x = 28,140.20

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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.