Home / 21,015.84-31,337.88-19,585.92

Finding the Fourth Proportional to 21,015.84, 31,337.88 and 19,585.92

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Solution

The fourth proportional to 21,015.84, 31,337.88 and 19,585.92 is: 29,205.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.84 : 31,337.88 = 19,585.92 : x
  2. Step 2: Convert to fraction form
    21,015.84/31,337.88 = 19,585.92/x
  3. Step 3: Cross multiply
    21,015.84x = 31,337.88 × 19,585.92
  4. Step 4: Simplify right side
    21,015.84x = 613,781,210.65
  5. Step 5: Solve for x
    x = 613,781,210.65/21,015.84
  6. Step 6: Final answer
    x = 29,205.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.