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Finding the Fourth Proportional to 8,990.79, 13,479.40 and 6,209.52

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Solution

The fourth proportional to 8,990.79, 13,479.40 and 6,209.52 is: 9,309.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.79 : 13,479.40 = 6,209.52 : x
  2. Step 2: Convert to fraction form
    8,990.79/13,479.40 = 6,209.52/x
  3. Step 3: Cross multiply
    8,990.79x = 13,479.40 × 6,209.52
  4. Step 4: Simplify right side
    8,990.79x = 83,700,603.89
  5. Step 5: Solve for x
    x = 83,700,603.89/8,990.79
  6. Step 6: Final answer
    x = 9,309.59

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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.