Home / 15,087.39-20,759.40-12,388.74

Finding the Fourth Proportional to 15,087.39, 20,759.40 and 12,388.74

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Solution

The fourth proportional to 15,087.39, 20,759.40 and 12,388.74 is: 17,046.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.39 : 20,759.40 = 12,388.74 : x
  2. Step 2: Convert to fraction form
    15,087.39/20,759.40 = 12,388.74/x
  3. Step 3: Cross multiply
    15,087.39x = 20,759.40 × 12,388.74
  4. Step 4: Simplify right side
    15,087.39x = 257,182,809.16
  5. Step 5: Solve for x
    x = 257,182,809.16/15,087.39
  6. Step 6: Final answer
    x = 17,046.21

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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.