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Finding the Fourth Proportional to 9,988.92, 14,990.07 and 4,145.54

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Solution

The fourth proportional to 9,988.92, 14,990.07 and 4,145.54 is: 6,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.92 : 14,990.07 = 4,145.54 : x
  2. Step 2: Convert to fraction form
    9,988.92/14,990.07 = 4,145.54/x
  3. Step 3: Cross multiply
    9,988.92x = 14,990.07 × 4,145.54
  4. Step 4: Simplify right side
    9,988.92x = 62,141,852.06
  5. Step 5: Solve for x
    x = 62,141,852.06/9,988.92
  6. Step 6: Final answer
    x = 6,221.08

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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.