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Finding the Fourth Proportional to 7,326.42, 10,988.19 and 1,989.63

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Solution

The fourth proportional to 7,326.42, 10,988.19 and 1,989.63 is: 2,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,326.42 : 10,988.19 = 1,989.63 : x
  2. Step 2: Convert to fraction form
    7,326.42/10,988.19 = 1,989.63/x
  3. Step 3: Cross multiply
    7,326.42x = 10,988.19 × 1,989.63
  4. Step 4: Simplify right side
    7,326.42x = 21,862,432.47
  5. Step 5: Solve for x
    x = 21,862,432.47/7,326.42
  6. Step 6: Final answer
    x = 2,984.05

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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.