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Finding the Fourth Proportional to 8,501.90, 12,740.40 and 7,624.40

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Solution

The fourth proportional to 8,501.90, 12,740.40 and 7,624.40 is: 11,425.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,501.90 : 12,740.40 = 7,624.40 : x
  2. Step 2: Convert to fraction form
    8,501.90/12,740.40 = 7,624.40/x
  3. Step 3: Cross multiply
    8,501.90x = 12,740.40 × 7,624.40
  4. Step 4: Simplify right side
    8,501.90x = 97,137,905.76
  5. Step 5: Solve for x
    x = 97,137,905.76/8,501.90
  6. Step 6: Final answer
    x = 11,425.43

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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.