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Finding the Fourth Proportional to 10,265.40, 15,401.70 and 9,905.40

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Solution

The fourth proportional to 10,265.40, 15,401.70 and 9,905.40 is: 14,861.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,265.40 : 15,401.70 = 9,905.40 : x
  2. Step 2: Convert to fraction form
    10,265.40/15,401.70 = 9,905.40/x
  3. Step 3: Cross multiply
    10,265.40x = 15,401.70 × 9,905.40
  4. Step 4: Simplify right side
    10,265.40x = 152,559,999.18
  5. Step 5: Solve for x
    x = 152,559,999.18/10,265.40
  6. Step 6: Final answer
    x = 14,861.57

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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.