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Finding the Fourth Proportional to 15,478.08, 21,359.61 and 8,404.08

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Solution

The fourth proportional to 15,478.08, 21,359.61 and 8,404.08 is: 11,597.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.08 : 21,359.61 = 8,404.08 : x
  2. Step 2: Convert to fraction form
    15,478.08/21,359.61 = 8,404.08/x
  3. Step 3: Cross multiply
    15,478.08x = 21,359.61 × 8,404.08
  4. Step 4: Simplify right side
    15,478.08x = 179,507,871.21
  5. Step 5: Solve for x
    x = 179,507,871.21/15,478.08
  6. Step 6: Final answer
    x = 11,597.55

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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.