Home / 21,040.60-31,437.65-20,304.78

Finding the Fourth Proportional to 21,040.60, 31,437.65 and 20,304.78

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Solution

The fourth proportional to 21,040.60, 31,437.65 and 20,304.78 is: 30,338.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.60 : 31,437.65 = 20,304.78 : x
  2. Step 2: Convert to fraction form
    21,040.60/31,437.65 = 20,304.78/x
  3. Step 3: Cross multiply
    21,040.60x = 31,437.65 × 20,304.78
  4. Step 4: Simplify right side
    21,040.60x = 638,334,566.97
  5. Step 5: Solve for x
    x = 638,334,566.97/21,040.60
  6. Step 6: Final answer
    x = 30,338.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.