Home / 15,121.07-20,866.10-8,406.52

Finding the Fourth Proportional to 15,121.07, 20,866.10 and 8,406.52

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Solution

The fourth proportional to 15,121.07, 20,866.10 and 8,406.52 is: 11,600.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.07 : 20,866.10 = 8,406.52 : x
  2. Step 2: Convert to fraction form
    15,121.07/20,866.10 = 8,406.52/x
  3. Step 3: Cross multiply
    15,121.07x = 20,866.10 × 8,406.52
  4. Step 4: Simplify right side
    15,121.07x = 175,411,286.97
  5. Step 5: Solve for x
    x = 175,411,286.97/15,121.07
  6. Step 6: Final answer
    x = 11,600.45

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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.