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Finding the Fourth Proportional to 18,124.86, 27,143.55 and 10,309.98

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Solution

The fourth proportional to 18,124.86, 27,143.55 and 10,309.98 is: 15,440.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,124.86 : 27,143.55 = 10,309.98 : x
  2. Step 2: Convert to fraction form
    18,124.86/27,143.55 = 10,309.98/x
  3. Step 3: Cross multiply
    18,124.86x = 27,143.55 × 10,309.98
  4. Step 4: Simplify right side
    18,124.86x = 279,849,457.63
  5. Step 5: Solve for x
    x = 279,849,457.63/18,124.86
  6. Step 6: Final answer
    x = 15,440.09

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1.5x scale

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.