Home / 28,015,718.40-38,680,934.40-21,147,955.20

Finding the Fourth Proportional to 28,015,718.40, 38,680,934.40 and 21,147,955.20

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Solution

The fourth proportional to 28,015,718.40, 38,680,934.40 and 21,147,955.20 is: 29,198,703.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015,718.40 : 38,680,934.40 = 21,147,955.20 : x
  2. Step 2: Convert to fraction form
    28,015,718.40/38,680,934.40 = 21,147,955.20/x
  3. Step 3: Cross multiply
    28,015,718.40x = 38,680,934.40 × 21,147,955.20
  4. Step 4: Simplify right side
    28,015,718.40x = 818,022,667,785,338.88
  5. Step 5: Solve for x
    x = 818,022,667,785,338.88/28,015,718.40
  6. Step 6: Final answer
    x = 29,198,703.96

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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.