Home / 15,109.62-20,853.75-12,587.73

Finding the Fourth Proportional to 15,109.62, 20,853.75 and 12,587.73

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Solution

The fourth proportional to 15,109.62, 20,853.75 and 12,587.73 is: 17,373.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.62 : 20,853.75 = 12,587.73 : x
  2. Step 2: Convert to fraction form
    15,109.62/20,853.75 = 12,587.73/x
  3. Step 3: Cross multiply
    15,109.62x = 20,853.75 × 12,587.73
  4. Step 4: Simplify right side
    15,109.62x = 262,501,374.49
  5. Step 5: Solve for x
    x = 262,501,374.49/15,109.62
  6. Step 6: Final answer
    x = 17,373.13

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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.