Home / 30,750.98-42,438.51-17,139.89

Finding the Fourth Proportional to 30,750.98, 42,438.51 and 17,139.89

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Solution

The fourth proportional to 30,750.98, 42,438.51 and 17,139.89 is: 23,654.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,750.98 : 42,438.51 = 17,139.89 : x
  2. Step 2: Convert to fraction form
    30,750.98/42,438.51 = 17,139.89/x
  3. Step 3: Cross multiply
    30,750.98x = 42,438.51 × 17,139.89
  4. Step 4: Simplify right side
    30,750.98x = 727,391,180.97
  5. Step 5: Solve for x
    x = 727,391,180.97/30,750.98
  6. Step 6: Final answer
    x = 23,654.25

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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.