Home / 15,415.68-21,283.92-10,387.38

Finding the Fourth Proportional to 15,415.68, 21,283.92 and 10,387.38

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Solution

The fourth proportional to 15,415.68, 21,283.92 and 10,387.38 is: 14,341.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.68 : 21,283.92 = 10,387.38 : x
  2. Step 2: Convert to fraction form
    15,415.68/21,283.92 = 10,387.38/x
  3. Step 3: Cross multiply
    15,415.68x = 21,283.92 × 10,387.38
  4. Step 4: Simplify right side
    15,415.68x = 221,084,164.93
  5. Step 5: Solve for x
    x = 221,084,164.93/15,415.68
  6. Step 6: Final answer
    x = 14,341.51

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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.