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Finding the Fourth Proportional to 9,943.40, 14,915.10 and 4,759.40

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Solution

The fourth proportional to 9,943.40, 14,915.10 and 4,759.40 is: 7,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,943.40 : 14,915.10 = 4,759.40 : x
  2. Step 2: Convert to fraction form
    9,943.40/14,915.10 = 4,759.40/x
  3. Step 3: Cross multiply
    9,943.40x = 14,915.10 × 4,759.40
  4. Step 4: Simplify right side
    9,943.40x = 70,986,926.94
  5. Step 5: Solve for x
    x = 70,986,926.94/9,943.40
  6. Step 6: Final answer
    x = 7,139.10

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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.