Home / 31,079.72-42,893.11-18,979.53

Finding the Fourth Proportional to 31,079.72, 42,893.11 and 18,979.53

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Solution

The fourth proportional to 31,079.72, 42,893.11 and 18,979.53 is: 26,193.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,079.72 : 42,893.11 = 18,979.53 : x
  2. Step 2: Convert to fraction form
    31,079.72/42,893.11 = 18,979.53/x
  3. Step 3: Cross multiply
    31,079.72x = 42,893.11 × 18,979.53
  4. Step 4: Simplify right side
    31,079.72x = 814,091,068.04
  5. Step 5: Solve for x
    x = 814,091,068.04/31,079.72
  6. Step 6: Final answer
    x = 26,193.64

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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.