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Finding the Fourth Proportional to 20,369.84, 28,108.86 and 12,410.78

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Solution

The fourth proportional to 20,369.84, 28,108.86 and 12,410.78 is: 17,125.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.84 : 28,108.86 = 12,410.78 : x
  2. Step 2: Convert to fraction form
    20,369.84/28,108.86 = 12,410.78/x
  3. Step 3: Cross multiply
    20,369.84x = 28,108.86 × 12,410.78
  4. Step 4: Simplify right side
    20,369.84x = 348,852,877.51
  5. Step 5: Solve for x
    x = 348,852,877.51/20,369.84
  6. Step 6: Final answer
    x = 17,125.95

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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.