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Finding the Fourth Proportional to 15,655.60, 21,604.64 and 8,582.02

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Solution

The fourth proportional to 15,655.60, 21,604.64 and 8,582.02 is: 11,843.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655.60 : 21,604.64 = 8,582.02 : x
  2. Step 2: Convert to fraction form
    15,655.60/21,604.64 = 8,582.02/x
  3. Step 3: Cross multiply
    15,655.60x = 21,604.64 × 8,582.02
  4. Step 4: Simplify right side
    15,655.60x = 185,411,403.92
  5. Step 5: Solve for x
    x = 185,411,403.92/15,655.60
  6. Step 6: Final answer
    x = 11,843.14

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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.