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Finding the Fourth Proportional to 8,920.90, 13,389.57 and 4,541.50

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Solution

The fourth proportional to 8,920.90, 13,389.57 and 4,541.50 is: 6,816.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.90 : 13,389.57 = 4,541.50 : x
  2. Step 2: Convert to fraction form
    8,920.90/13,389.57 = 4,541.50/x
  3. Step 3: Cross multiply
    8,920.90x = 13,389.57 × 4,541.50
  4. Step 4: Simplify right side
    8,920.90x = 60,808,732.16
  5. Step 5: Solve for x
    x = 60,808,732.16/8,920.90
  6. Step 6: Final answer
    x = 6,816.43

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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.