Home / 12,587.28-18,883.20-5,187.63

Finding the Fourth Proportional to 12,587.28, 18,883.20 and 5,187.63

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Solution

The fourth proportional to 12,587.28, 18,883.20 and 5,187.63 is: 7,782.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.28 : 18,883.20 = 5,187.63 : x
  2. Step 2: Convert to fraction form
    12,587.28/18,883.20 = 5,187.63/x
  3. Step 3: Cross multiply
    12,587.28x = 18,883.20 × 5,187.63
  4. Step 4: Simplify right side
    12,587.28x = 97,959,054.82
  5. Step 5: Solve for x
    x = 97,959,054.82/12,587.28
  6. Step 6: Final answer
    x = 7,782.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.