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Finding the Fourth Proportional to 15,552.60, 21,462.80 and 8,479.12

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Solution

The fourth proportional to 15,552.60, 21,462.80 and 8,479.12 is: 11,701.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,552.60 : 21,462.80 = 8,479.12 : x
  2. Step 2: Convert to fraction form
    15,552.60/21,462.80 = 8,479.12/x
  3. Step 3: Cross multiply
    15,552.60x = 21,462.80 × 8,479.12
  4. Step 4: Simplify right side
    15,552.60x = 181,985,656.74
  5. Step 5: Solve for x
    x = 181,985,656.74/15,552.60
  6. Step 6: Final answer
    x = 11,701.30

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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.