Home / 21,079.10-31,618.65-7,934.42

Finding the Fourth Proportional to 21,079.10, 31,618.65 and 7,934.42

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Solution

The fourth proportional to 21,079.10, 31,618.65 and 7,934.42 is: 11,901.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.10 : 31,618.65 = 7,934.42 : x
  2. Step 2: Convert to fraction form
    21,079.10/31,618.65 = 7,934.42/x
  3. Step 3: Cross multiply
    21,079.10x = 31,618.65 × 7,934.42
  4. Step 4: Simplify right side
    21,079.10x = 250,875,648.93
  5. Step 5: Solve for x
    x = 250,875,648.93/21,079.10
  6. Step 6: Final answer
    x = 11,901.63

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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.