Home / 20,298.94-28,020.13-15,277.65

Finding the Fourth Proportional to 20,298.94, 28,020.13 and 15,277.65

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Solution

The fourth proportional to 20,298.94, 28,020.13 and 15,277.65 is: 21,088.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.94 : 28,020.13 = 15,277.65 : x
  2. Step 2: Convert to fraction form
    20,298.94/28,020.13 = 15,277.65/x
  3. Step 3: Cross multiply
    20,298.94x = 28,020.13 × 15,277.65
  4. Step 4: Simplify right side
    20,298.94x = 428,081,595.82
  5. Step 5: Solve for x
    x = 428,081,595.82/20,298.94
  6. Step 6: Final answer
    x = 21,088.87

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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.