Home / 42,882.39-64,345.50-20,418.48

Finding the Fourth Proportional to 42,882.39, 64,345.50 and 20,418.48

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Solution

The fourth proportional to 42,882.39, 64,345.50 and 20,418.48 is: 30,638.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,882.39 : 64,345.50 = 20,418.48 : x
  2. Step 2: Convert to fraction form
    42,882.39/64,345.50 = 20,418.48/x
  3. Step 3: Cross multiply
    42,882.39x = 64,345.50 × 20,418.48
  4. Step 4: Simplify right side
    42,882.39x = 1,313,837,304.84
  5. Step 5: Solve for x
    x = 1,313,837,304.84/42,882.39
  6. Step 6: Final answer
    x = 30,638.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.