Home / 12,820.08-19,233.36-5,420.76

Finding the Fourth Proportional to 12,820.08, 19,233.36 and 5,420.76

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Solution

The fourth proportional to 12,820.08, 19,233.36 and 5,420.76 is: 8,132.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.08 : 19,233.36 = 5,420.76 : x
  2. Step 2: Convert to fraction form
    12,820.08/19,233.36 = 5,420.76/x
  3. Step 3: Cross multiply
    12,820.08x = 19,233.36 × 5,420.76
  4. Step 4: Simplify right side
    12,820.08x = 104,259,428.55
  5. Step 5: Solve for x
    x = 104,259,428.55/12,820.08
  6. Step 6: Final answer
    x = 8,132.51

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Double scale
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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.