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Finding the Fourth Proportional to 15,324, 21,147.14 and 8,700

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Solution

The fourth proportional to 15,324, 21,147.14 and 8,700 is: 12,006.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,324 : 21,147.14 = 8,700 : x
  2. Step 2: Convert to fraction form
    15,324/21,147.14 = 8,700/x
  3. Step 3: Cross multiply
    15,324x = 21,147.14 × 8,700
  4. Step 4: Simplify right side
    15,324x = 183,980,118
  5. Step 5: Solve for x
    x = 183,980,118/15,324
  6. Step 6: Final answer
    x = 12,006.01

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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.