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Finding the Fourth Proportional to 19,640.61, 27,104.61 and 10,688.69

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Solution

The fourth proportional to 19,640.61, 27,104.61 and 10,688.69 is: 14,750.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.61 : 27,104.61 = 10,688.69 : x
  2. Step 2: Convert to fraction form
    19,640.61/27,104.61 = 10,688.69/x
  3. Step 3: Cross multiply
    19,640.61x = 27,104.61 × 10,688.69
  4. Step 4: Simplify right side
    19,640.61x = 289,712,773.86
  5. Step 5: Solve for x
    x = 289,712,773.86/19,640.61
  6. Step 6: Final answer
    x = 14,750.70

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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.