Home / 12,621.40-17,291.39-12,148.47

Finding the Fourth Proportional to 12,621.40, 17,291.39 and 12,148.47

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Solution

The fourth proportional to 12,621.40, 17,291.39 and 12,148.47 is: 16,643.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.40 : 17,291.39 = 12,148.47 : x
  2. Step 2: Convert to fraction form
    12,621.40/17,291.39 = 12,148.47/x
  3. Step 3: Cross multiply
    12,621.40x = 17,291.39 × 12,148.47
  4. Step 4: Simplify right side
    12,621.40x = 210,063,932.67
  5. Step 5: Solve for x
    x = 210,063,932.67/12,621.40
  6. Step 6: Final answer
    x = 16,643.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.