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Finding the Fourth Proportional to 8,818.90, 13,289.02 and 7,293.21

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Solution

The fourth proportional to 8,818.90, 13,289.02 and 7,293.21 is: 10,989.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,818.90 : 13,289.02 = 7,293.21 : x
  2. Step 2: Convert to fraction form
    8,818.90/13,289.02 = 7,293.21/x
  3. Step 3: Cross multiply
    8,818.90x = 13,289.02 × 7,293.21
  4. Step 4: Simplify right side
    8,818.90x = 96,919,547.11
  5. Step 5: Solve for x
    x = 96,919,547.11/8,818.90
  6. Step 6: Final answer
    x = 10,989.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.