Home / 31,690.72-43,714.02-20,356.36

Finding the Fourth Proportional to 31,690.72, 43,714.02 and 20,356.36

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Solution

The fourth proportional to 31,690.72, 43,714.02 and 20,356.36 is: 28,079.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.72 : 43,714.02 = 20,356.36 : x
  2. Step 2: Convert to fraction form
    31,690.72/43,714.02 = 20,356.36/x
  3. Step 3: Cross multiply
    31,690.72x = 43,714.02 × 20,356.36
  4. Step 4: Simplify right side
    31,690.72x = 889,858,328.17
  5. Step 5: Solve for x
    x = 889,858,328.17/31,690.72
  6. Step 6: Final answer
    x = 28,079.46

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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.