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Finding the Fourth Proportional to 18,700.68, 28,048.59 and 8,310

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Solution

The fourth proportional to 18,700.68, 28,048.59 and 8,310 is: 12,463.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.68 : 28,048.59 = 8,310 : x
  2. Step 2: Convert to fraction form
    18,700.68/28,048.59 = 8,310/x
  3. Step 3: Cross multiply
    18,700.68x = 28,048.59 × 8,310
  4. Step 4: Simplify right side
    18,700.68x = 233,083,782.90
  5. Step 5: Solve for x
    x = 233,083,782.90/18,700.68
  6. Step 6: Final answer
    x = 12,463.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.