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Finding the Fourth Proportional to 15,408.65, 21,263.91 and 8,335.10

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Solution

The fourth proportional to 15,408.65, 21,263.91 and 8,335.10 is: 11,502.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,408.65 : 21,263.91 = 8,335.10 : x
  2. Step 2: Convert to fraction form
    15,408.65/21,263.91 = 8,335.10/x
  3. Step 3: Cross multiply
    15,408.65x = 21,263.91 × 8,335.10
  4. Step 4: Simplify right side
    15,408.65x = 177,236,816.24
  5. Step 5: Solve for x
    x = 177,236,816.24/15,408.65
  6. Step 6: Final answer
    x = 11,502.42

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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.