Home / 31,045.75-42,836.65-20,306.36

Finding the Fourth Proportional to 31,045.75, 42,836.65 and 20,306.36

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Solution

The fourth proportional to 31,045.75, 42,836.65 and 20,306.36 is: 28,018.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,045.75 : 42,836.65 = 20,306.36 : x
  2. Step 2: Convert to fraction form
    31,045.75/42,836.65 = 20,306.36/x
  3. Step 3: Cross multiply
    31,045.75x = 42,836.65 × 20,306.36
  4. Step 4: Simplify right side
    31,045.75x = 869,856,492.42
  5. Step 5: Solve for x
    x = 869,856,492.42/31,045.75
  6. Step 6: Final answer
    x = 28,018.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.