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Finding the Fourth Proportional to 10,885.78, 15,023.62 and 7,356.21

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Solution

The fourth proportional to 10,885.78, 15,023.62 and 7,356.21 is: 10,152.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,885.78 : 15,023.62 = 7,356.21 : x
  2. Step 2: Convert to fraction form
    10,885.78/15,023.62 = 7,356.21/x
  3. Step 3: Cross multiply
    10,885.78x = 15,023.62 × 7,356.21
  4. Step 4: Simplify right side
    10,885.78x = 110,516,903.68
  5. Step 5: Solve for x
    x = 110,516,903.68/10,885.78
  6. Step 6: Final answer
    x = 10,152.41

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Double scale
Find fourth proportional to 10,886.78, 15,025 and 7,357.21
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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.