Home / 30,938.80-42,695.51-16,791.65

Finding the Fourth Proportional to 30,938.80, 42,695.51 and 16,791.65

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Solution

The fourth proportional to 30,938.80, 42,695.51 and 16,791.65 is: 23,172.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,938.80 : 42,695.51 = 16,791.65 : x
  2. Step 2: Convert to fraction form
    30,938.80/42,695.51 = 16,791.65/x
  3. Step 3: Cross multiply
    30,938.80x = 42,695.51 × 16,791.65
  4. Step 4: Simplify right side
    30,938.80x = 716,928,060.49
  5. Step 5: Solve for x
    x = 716,928,060.49/30,938.80
  6. Step 6: Final answer
    x = 23,172.46

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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.