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Finding the Fourth Proportional to 8,710.11, 12,021.84 and 5,355.80

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Solution

The fourth proportional to 8,710.11, 12,021.84 and 5,355.80 is: 7,392.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,710.11 : 12,021.84 = 5,355.80 : x
  2. Step 2: Convert to fraction form
    8,710.11/12,021.84 = 5,355.80/x
  3. Step 3: Cross multiply
    8,710.11x = 12,021.84 × 5,355.80
  4. Step 4: Simplify right side
    8,710.11x = 64,386,570.67
  5. Step 5: Solve for x
    x = 64,386,570.67/8,710.11
  6. Step 6: Final answer
    x = 7,392.17

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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.