Home / 12,587.18-18,881.64-3,822.80

Finding the Fourth Proportional to 12,587.18, 18,881.64 and 3,822.80

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Solution

The fourth proportional to 12,587.18, 18,881.64 and 3,822.80 is: 5,734.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.18 : 18,881.64 = 3,822.80 : x
  2. Step 2: Convert to fraction form
    12,587.18/18,881.64 = 3,822.80/x
  3. Step 3: Cross multiply
    12,587.18x = 18,881.64 × 3,822.80
  4. Step 4: Simplify right side
    12,587.18x = 72,180,733.39
  5. Step 5: Solve for x
    x = 72,180,733.39/12,587.18
  6. Step 6: Final answer
    x = 5,734.46

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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.