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Finding the Fourth Proportional to 6,990.61, 9,646.88 and 4,008.19

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Solution

The fourth proportional to 6,990.61, 9,646.88 and 4,008.19 is: 5,531.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.61 : 9,646.88 = 4,008.19 : x
  2. Step 2: Convert to fraction form
    6,990.61/9,646.88 = 4,008.19/x
  3. Step 3: Cross multiply
    6,990.61x = 9,646.88 × 4,008.19
  4. Step 4: Simplify right side
    6,990.61x = 38,666,507.91
  5. Step 5: Solve for x
    x = 38,666,507.91/6,990.61
  6. Step 6: Final answer
    x = 5,531.21

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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.