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Finding the Fourth Proportional to 7,040.62, 9,715.98 and 4,056.40

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Solution

The fourth proportional to 7,040.62, 9,715.98 and 4,056.40 is: 5,597.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040.62 : 9,715.98 = 4,056.40 : x
  2. Step 2: Convert to fraction form
    7,040.62/9,715.98 = 4,056.40/x
  3. Step 3: Cross multiply
    7,040.62x = 9,715.98 × 4,056.40
  4. Step 4: Simplify right side
    7,040.62x = 39,411,901.27
  5. Step 5: Solve for x
    x = 39,411,901.27/7,040.62
  6. Step 6: Final answer
    x = 5,597.79

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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.