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Finding the Fourth Proportional to 8,918.74, 12,307.68 and 5,141.68

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Solution

The fourth proportional to 8,918.74, 12,307.68 and 5,141.68 is: 7,095.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.74 : 12,307.68 = 5,141.68 : x
  2. Step 2: Convert to fraction form
    8,918.74/12,307.68 = 5,141.68/x
  3. Step 3: Cross multiply
    8,918.74x = 12,307.68 × 5,141.68
  4. Step 4: Simplify right side
    8,918.74x = 63,282,152.10
  5. Step 5: Solve for x
    x = 63,282,152.10/8,918.74
  6. Step 6: Final answer
    x = 7,095.41

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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.