Home / 20,827.53-31,386.18-18,853.76

Finding the Fourth Proportional to 20,827.53, 31,386.18 and 18,853.76

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Solution

The fourth proportional to 20,827.53, 31,386.18 and 18,853.76 is: 28,411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.53 : 31,386.18 = 18,853.76 : x
  2. Step 2: Convert to fraction form
    20,827.53/31,386.18 = 18,853.76/x
  3. Step 3: Cross multiply
    20,827.53x = 31,386.18 × 18,853.76
  4. Step 4: Simplify right side
    20,827.53x = 591,747,654.20
  5. Step 5: Solve for x
    x = 591,747,654.20/20,827.53
  6. Step 6: Final answer
    x = 28,411.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.