Home / 12,549.78-18,821.52-5,156.28

Finding the Fourth Proportional to 12,549.78, 18,821.52 and 5,156.28

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Solution

The fourth proportional to 12,549.78, 18,821.52 and 5,156.28 is: 7,733.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,549.78 : 18,821.52 = 5,156.28 : x
  2. Step 2: Convert to fraction form
    12,549.78/18,821.52 = 5,156.28/x
  3. Step 3: Cross multiply
    12,549.78x = 18,821.52 × 5,156.28
  4. Step 4: Simplify right side
    12,549.78x = 97,049,027.15
  5. Step 5: Solve for x
    x = 97,049,027.15/12,549.78
  6. Step 6: Final answer
    x = 7,733.13

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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.