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Finding the Fourth Proportional to 8,990.88, 12,407.16 and 5,011.92

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Solution

The fourth proportional to 8,990.88, 12,407.16 and 5,011.92 is: 6,916.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.88 : 12,407.16 = 5,011.92 : x
  2. Step 2: Convert to fraction form
    8,990.88/12,407.16 = 5,011.92/x
  3. Step 3: Cross multiply
    8,990.88x = 12,407.16 × 5,011.92
  4. Step 4: Simplify right side
    8,990.88x = 62,183,693.35
  5. Step 5: Solve for x
    x = 62,183,693.35/8,990.88
  6. Step 6: Final answer
    x = 6,916.31

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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.