Home / 20,357.08-30,490.51-15,642.39

Finding the Fourth Proportional to 20,357.08, 30,490.51 and 15,642.39

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Solution

The fourth proportional to 20,357.08, 30,490.51 and 15,642.39 is: 23,428.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.08 : 30,490.51 = 15,642.39 : x
  2. Step 2: Convert to fraction form
    20,357.08/30,490.51 = 15,642.39/x
  3. Step 3: Cross multiply
    20,357.08x = 30,490.51 × 15,642.39
  4. Step 4: Simplify right side
    20,357.08x = 476,944,257.16
  5. Step 5: Solve for x
    x = 476,944,257.16/20,357.08
  6. Step 6: Final answer
    x = 23,428.91

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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.