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Finding the Fourth Proportional to 15,403.68, 21,257.08 and 8,330.10

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Solution

The fourth proportional to 15,403.68, 21,257.08 and 8,330.10 is: 11,495.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.68 : 21,257.08 = 8,330.10 : x
  2. Step 2: Convert to fraction form
    15,403.68/21,257.08 = 8,330.10/x
  3. Step 3: Cross multiply
    15,403.68x = 21,257.08 × 8,330.10
  4. Step 4: Simplify right side
    15,403.68x = 177,073,602.11
  5. Step 5: Solve for x
    x = 177,073,602.11/15,403.68
  6. Step 6: Final answer
    x = 11,495.54

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Similar ratio
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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.