Home / 12,486.40-17,223.60-9,125.20

Finding the Fourth Proportional to 12,486.40, 17,223.60 and 9,125.20

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Solution

The fourth proportional to 12,486.40, 17,223.60 and 9,125.20 is: 12,587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.40 : 17,223.60 = 9,125.20 : x
  2. Step 2: Convert to fraction form
    12,486.40/17,223.60 = 9,125.20/x
  3. Step 3: Cross multiply
    12,486.40x = 17,223.60 × 9,125.20
  4. Step 4: Simplify right side
    12,486.40x = 157,168,794.72
  5. Step 5: Solve for x
    x = 157,168,794.72/12,486.40
  6. Step 6: Final answer
    x = 12,587.20

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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.