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Finding the Fourth Proportional to 8,870.99, 13,283.76 and 8,608.21

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Solution

The fourth proportional to 8,870.99, 13,283.76 and 8,608.21 is: 12,890.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,870.99 : 13,283.76 = 8,608.21 : x
  2. Step 2: Convert to fraction form
    8,870.99/13,283.76 = 8,608.21/x
  3. Step 3: Cross multiply
    8,870.99x = 13,283.76 × 8,608.21
  4. Step 4: Simplify right side
    8,870.99x = 114,349,395.67
  5. Step 5: Solve for x
    x = 114,349,395.67/8,870.99
  6. Step 6: Final answer
    x = 12,890.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.