Home / 39,900.12-55,064.84-21,995.13

Finding the Fourth Proportional to 39,900.12, 55,064.84 and 21,995.13

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Solution

The fourth proportional to 39,900.12, 55,064.84 and 21,995.13 is: 30,354.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.12 : 55,064.84 = 21,995.13 : x
  2. Step 2: Convert to fraction form
    39,900.12/55,064.84 = 21,995.13/x
  3. Step 3: Cross multiply
    39,900.12x = 55,064.84 × 21,995.13
  4. Step 4: Simplify right side
    39,900.12x = 1,211,158,314.23
  5. Step 5: Solve for x
    x = 1,211,158,314.23/39,900.12
  6. Step 6: Final answer
    x = 30,354.75

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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.