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Finding the Fourth Proportional to 15,561.54, 21,475.80 and 8,488.08

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Solution

The fourth proportional to 15,561.54, 21,475.80 and 8,488.08 is: 11,714.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,561.54 : 21,475.80 = 8,488.08 : x
  2. Step 2: Convert to fraction form
    15,561.54/21,475.80 = 8,488.08/x
  3. Step 3: Cross multiply
    15,561.54x = 21,475.80 × 8,488.08
  4. Step 4: Simplify right side
    15,561.54x = 182,288,308.46
  5. Step 5: Solve for x
    x = 182,288,308.46/15,561.54
  6. Step 6: Final answer
    x = 11,714.03

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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.