Home / 20,852.10-31,278.15-18,446.40

Finding the Fourth Proportional to 20,852.10, 31,278.15 and 18,446.40

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Solution

The fourth proportional to 20,852.10, 31,278.15 and 18,446.40 is: 27,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.10 : 31,278.15 = 18,446.40 : x
  2. Step 2: Convert to fraction form
    20,852.10/31,278.15 = 18,446.40/x
  3. Step 3: Cross multiply
    20,852.10x = 31,278.15 × 18,446.40
  4. Step 4: Simplify right side
    20,852.10x = 576,969,266.16
  5. Step 5: Solve for x
    x = 576,969,266.16/20,852.10
  6. Step 6: Final answer
    x = 27,669.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.