Home / 31,062.08-42,835.99-20,876.12

Finding the Fourth Proportional to 31,062.08, 42,835.99 and 20,876.12

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Solution

The fourth proportional to 31,062.08, 42,835.99 and 20,876.12 is: 28,789.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,062.08 : 42,835.99 = 20,876.12 : x
  2. Step 2: Convert to fraction form
    31,062.08/42,835.99 = 20,876.12/x
  3. Step 3: Cross multiply
    31,062.08x = 42,835.99 × 20,876.12
  4. Step 4: Simplify right side
    31,062.08x = 894,249,001.19
  5. Step 5: Solve for x
    x = 894,249,001.19/31,062.08
  6. Step 6: Final answer
    x = 28,789.09

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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.