Home / 30,805.02-42,448.14-21,247.83

Finding the Fourth Proportional to 30,805.02, 42,448.14 and 21,247.83

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Solution

The fourth proportional to 30,805.02, 42,448.14 and 21,247.83 is: 29,278.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,805.02 : 42,448.14 = 21,247.83 : x
  2. Step 2: Convert to fraction form
    30,805.02/42,448.14 = 21,247.83/x
  3. Step 3: Cross multiply
    30,805.02x = 42,448.14 × 21,247.83
  4. Step 4: Simplify right side
    30,805.02x = 901,930,862.54
  5. Step 5: Solve for x
    x = 901,930,862.54/30,805.02
  6. Step 6: Final answer
    x = 29,278.70

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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.