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Finding the Fourth Proportional to 7,009.28, 10,521.28 and 3,116.40

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Solution

The fourth proportional to 7,009.28, 10,521.28 and 3,116.40 is: 4,677.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,009.28 : 10,521.28 = 3,116.40 : x
  2. Step 2: Convert to fraction form
    7,009.28/10,521.28 = 3,116.40/x
  3. Step 3: Cross multiply
    7,009.28x = 10,521.28 × 3,116.40
  4. Step 4: Simplify right side
    7,009.28x = 32,788,516.99
  5. Step 5: Solve for x
    x = 32,788,516.99/7,009.28
  6. Step 6: Final answer
    x = 4,677.87

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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.