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Finding the Fourth Proportional to 15,370.70, 21,211.80 and 9,401.12

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Solution

The fourth proportional to 15,370.70, 21,211.80 and 9,401.12 is: 12,973.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,370.70 : 21,211.80 = 9,401.12 : x
  2. Step 2: Convert to fraction form
    15,370.70/21,211.80 = 9,401.12/x
  3. Step 3: Cross multiply
    15,370.70x = 21,211.80 × 9,401.12
  4. Step 4: Simplify right side
    15,370.70x = 199,414,677.22
  5. Step 5: Solve for x
    x = 199,414,677.22/15,370.70
  6. Step 6: Final answer
    x = 12,973.69

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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.