Home / 31,051.72-42,823.38-20,437.48

Finding the Fourth Proportional to 31,051.72, 42,823.38 and 20,437.48

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Solution

The fourth proportional to 31,051.72, 42,823.38 and 20,437.48 is: 28,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,051.72 : 42,823.38 = 20,437.48 : x
  2. Step 2: Convert to fraction form
    31,051.72/42,823.38 = 20,437.48/x
  3. Step 3: Cross multiply
    31,051.72x = 42,823.38 × 20,437.48
  4. Step 4: Simplify right side
    31,051.72x = 875,201,972.28
  5. Step 5: Solve for x
    x = 875,201,972.28/31,051.72
  6. Step 6: Final answer
    x = 28,185.30

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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.