Home / 20,189.47-30,077.02-19,278.65

Finding the Fourth Proportional to 20,189.47, 30,077.02 and 19,278.65

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Solution

The fourth proportional to 20,189.47, 30,077.02 and 19,278.65 is: 28,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.47 : 30,077.02 = 19,278.65 : x
  2. Step 2: Convert to fraction form
    20,189.47/30,077.02 = 19,278.65/x
  3. Step 3: Cross multiply
    20,189.47x = 30,077.02 × 19,278.65
  4. Step 4: Simplify right side
    20,189.47x = 579,844,274.99
  5. Step 5: Solve for x
    x = 579,844,274.99/20,189.47
  6. Step 6: Final answer
    x = 28,720.14

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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.