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Finding the Fourth Proportional to 8,898.75, 12,281.36 and 5,172.75

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Solution

The fourth proportional to 8,898.75, 12,281.36 and 5,172.75 is: 7,139.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.75 : 12,281.36 = 5,172.75 : x
  2. Step 2: Convert to fraction form
    8,898.75/12,281.36 = 5,172.75/x
  3. Step 3: Cross multiply
    8,898.75x = 12,281.36 × 5,172.75
  4. Step 4: Simplify right side
    8,898.75x = 63,528,379.08
  5. Step 5: Solve for x
    x = 63,528,379.08/8,898.75
  6. Step 6: Final answer
    x = 7,139.02

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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.