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Finding the Fourth Proportional to 7,040.79, 9,713.52 and 4,915.76

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Solution

The fourth proportional to 7,040.79, 9,713.52 and 4,915.76 is: 6,781.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040.79 : 9,713.52 = 4,915.76 : x
  2. Step 2: Convert to fraction form
    7,040.79/9,713.52 = 4,915.76/x
  3. Step 3: Cross multiply
    7,040.79x = 9,713.52 × 4,915.76
  4. Step 4: Simplify right side
    7,040.79x = 47,749,284.51
  5. Step 5: Solve for x
    x = 47,749,284.51/7,040.79
  6. Step 6: Final answer
    x = 6,781.81

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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.