Home / 31,029.48-42,840.90-20,437.11

Finding the Fourth Proportional to 31,029.48, 42,840.90 and 20,437.11

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Solution

The fourth proportional to 31,029.48, 42,840.90 and 20,437.11 is: 28,216.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,029.48 : 42,840.90 = 20,437.11 : x
  2. Step 2: Convert to fraction form
    31,029.48/42,840.90 = 20,437.11/x
  3. Step 3: Cross multiply
    31,029.48x = 42,840.90 × 20,437.11
  4. Step 4: Simplify right side
    31,029.48x = 875,544,185.80
  5. Step 5: Solve for x
    x = 875,544,185.80/31,029.48
  6. Step 6: Final answer
    x = 28,216.53

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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.