Home / 31,397.02-43,339.26-20,790.07

Finding the Fourth Proportional to 31,397.02, 43,339.26 and 20,790.07

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Solution

The fourth proportional to 31,397.02, 43,339.26 and 20,790.07 is: 28,697.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,397.02 : 43,339.26 = 20,790.07 : x
  2. Step 2: Convert to fraction form
    31,397.02/43,339.26 = 20,790.07/x
  3. Step 3: Cross multiply
    31,397.02x = 43,339.26 × 20,790.07
  4. Step 4: Simplify right side
    31,397.02x = 901,026,249.15
  5. Step 5: Solve for x
    x = 901,026,249.15/31,397.02
  6. Step 6: Final answer
    x = 28,697.83

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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.