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Finding the Fourth Proportional to 8,717.78, 12,030.78 and 5,133.07

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Solution

The fourth proportional to 8,717.78, 12,030.78 and 5,133.07 is: 7,083.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,717.78 : 12,030.78 = 5,133.07 : x
  2. Step 2: Convert to fraction form
    8,717.78/12,030.78 = 5,133.07/x
  3. Step 3: Cross multiply
    8,717.78x = 12,030.78 × 5,133.07
  4. Step 4: Simplify right side
    8,717.78x = 61,754,841.31
  5. Step 5: Solve for x
    x = 61,754,841.31/8,717.78
  6. Step 6: Final answer
    x = 7,083.78

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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.