Home / 28,228.30-38,955.45-15,480.65

Finding the Fourth Proportional to 28,228.30, 38,955.45 and 15,480.65

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Solution

The fourth proportional to 28,228.30, 38,955.45 and 15,480.65 is: 21,363.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.30 : 38,955.45 = 15,480.65 : x
  2. Step 2: Convert to fraction form
    28,228.30/38,955.45 = 15,480.65/x
  3. Step 3: Cross multiply
    28,228.30x = 38,955.45 × 15,480.65
  4. Step 4: Simplify right side
    28,228.30x = 603,055,579.82
  5. Step 5: Solve for x
    x = 603,055,579.82/28,228.30
  6. Step 6: Final answer
    x = 21,363.51

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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.