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Finding the Fourth Proportional to 12,877.05, 17,766.18 and 7,210.95

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Solution

The fourth proportional to 12,877.05, 17,766.18 and 7,210.95 is: 9,948.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,877.05 : 17,766.18 = 7,210.95 : x
  2. Step 2: Convert to fraction form
    12,877.05/17,766.18 = 7,210.95/x
  3. Step 3: Cross multiply
    12,877.05x = 17,766.18 × 7,210.95
  4. Step 4: Simplify right side
    12,877.05x = 128,111,035.67
  5. Step 5: Solve for x
    x = 128,111,035.67/12,877.05
  6. Step 6: Final answer
    x = 9,948.79

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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.