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Finding the Fourth Proportional to 7,113.92, 9,817.24 and 3,970.28

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Solution

The fourth proportional to 7,113.92, 9,817.24 and 3,970.28 is: 5,479.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.92 : 9,817.24 = 3,970.28 : x
  2. Step 2: Convert to fraction form
    7,113.92/9,817.24 = 3,970.28/x
  3. Step 3: Cross multiply
    7,113.92x = 9,817.24 × 3,970.28
  4. Step 4: Simplify right side
    7,113.92x = 38,977,191.63
  5. Step 5: Solve for x
    x = 38,977,191.63/7,113.92
  6. Step 6: Final answer
    x = 5,479.00

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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.