Home / 30,981.11-42,756.51-19,047.38

Finding the Fourth Proportional to 30,981.11, 42,756.51 and 19,047.38

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Solution

The fourth proportional to 30,981.11, 42,756.51 and 19,047.38 is: 26,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.11 : 42,756.51 = 19,047.38 : x
  2. Step 2: Convert to fraction form
    30,981.11/42,756.51 = 19,047.38/x
  3. Step 3: Cross multiply
    30,981.11x = 42,756.51 × 19,047.38
  4. Step 4: Simplify right side
    30,981.11x = 814,399,279.66
  5. Step 5: Solve for x
    x = 814,399,279.66/30,981.11
  6. Step 6: Final answer
    x = 26,286.97

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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.