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Finding the Fourth Proportional to 8,973.90, 12,384.39 and 7,479.33

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Solution

The fourth proportional to 8,973.90, 12,384.39 and 7,479.33 is: 10,321.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,973.90 : 12,384.39 = 7,479.33 : x
  2. Step 2: Convert to fraction form
    8,973.90/12,384.39 = 7,479.33/x
  3. Step 3: Cross multiply
    8,973.90x = 12,384.39 × 7,479.33
  4. Step 4: Simplify right side
    8,973.90x = 92,626,939.66
  5. Step 5: Solve for x
    x = 92,626,939.66/8,973.90
  6. Step 6: Final answer
    x = 10,321.82

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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.