Home / 15,375.43-21,218.52-9,406.99

Finding the Fourth Proportional to 15,375.43, 21,218.52 and 9,406.99

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Solution

The fourth proportional to 15,375.43, 21,218.52 and 9,406.99 is: 12,981.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.43 : 21,218.52 = 9,406.99 : x
  2. Step 2: Convert to fraction form
    15,375.43/21,218.52 = 9,406.99/x
  3. Step 3: Cross multiply
    15,375.43x = 21,218.52 × 9,406.99
  4. Step 4: Simplify right side
    15,375.43x = 199,602,405.45
  5. Step 5: Solve for x
    x = 199,602,405.45/15,375.43
  6. Step 6: Final answer
    x = 12,981.91

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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.