Home / 31,112.12-42,954.98-21,437.89

Finding the Fourth Proportional to 31,112.12, 42,954.98 and 21,437.89

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Solution

The fourth proportional to 31,112.12, 42,954.98 and 21,437.89 is: 29,598.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,112.12 : 42,954.98 = 21,437.89 : x
  2. Step 2: Convert to fraction form
    31,112.12/42,954.98 = 21,437.89/x
  3. Step 3: Cross multiply
    31,112.12x = 42,954.98 × 21,437.89
  4. Step 4: Simplify right side
    31,112.12x = 920,863,921.62
  5. Step 5: Solve for x
    x = 920,863,921.62/31,112.12
  6. Step 6: Final answer
    x = 29,598.24

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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.