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Finding the Fourth Proportional to 8,990.90, 12,407.02 and 5,012.36

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Solution

The fourth proportional to 8,990.90, 12,407.02 and 5,012.36 is: 6,916.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.90 : 12,407.02 = 5,012.36 : x
  2. Step 2: Convert to fraction form
    8,990.90/12,407.02 = 5,012.36/x
  3. Step 3: Cross multiply
    8,990.90x = 12,407.02 × 5,012.36
  4. Step 4: Simplify right side
    8,990.90x = 62,188,450.77
  5. Step 5: Solve for x
    x = 62,188,450.77/8,990.90
  6. Step 6: Final answer
    x = 6,916.82

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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.