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Finding the Fourth Proportional to 8,812.90, 12,155.43 and 7,484.50

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Solution

The fourth proportional to 8,812.90, 12,155.43 and 7,484.50 is: 10,323.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.90 : 12,155.43 = 7,484.50 : x
  2. Step 2: Convert to fraction form
    8,812.90/12,155.43 = 7,484.50/x
  3. Step 3: Cross multiply
    8,812.90x = 12,155.43 × 7,484.50
  4. Step 4: Simplify right side
    8,812.90x = 90,977,315.84
  5. Step 5: Solve for x
    x = 90,977,315.84/8,812.90
  6. Step 6: Final answer
    x = 10,323.20

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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.