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Finding the Fourth Proportional to 15,312.70, 21,134.82 and 9,343.09

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Solution

The fourth proportional to 15,312.70, 21,134.82 and 9,343.09 is: 12,895.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.70 : 21,134.82 = 9,343.09 : x
  2. Step 2: Convert to fraction form
    15,312.70/21,134.82 = 9,343.09/x
  3. Step 3: Cross multiply
    15,312.70x = 21,134.82 × 9,343.09
  4. Step 4: Simplify right side
    15,312.70x = 197,464,525.39
  5. Step 5: Solve for x
    x = 197,464,525.39/15,312.70
  6. Step 6: Final answer
    x = 12,895.47

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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.