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Finding the Fourth Proportional to 12,693.89, 19,007.71 and 10,215.17

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Solution

The fourth proportional to 12,693.89, 19,007.71 and 10,215.17 is: 15,296.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,693.89 : 19,007.71 = 10,215.17 : x
  2. Step 2: Convert to fraction form
    12,693.89/19,007.71 = 10,215.17/x
  3. Step 3: Cross multiply
    12,693.89x = 19,007.71 × 10,215.17
  4. Step 4: Simplify right side
    12,693.89x = 194,166,988.96
  5. Step 5: Solve for x
    x = 194,166,988.96/12,693.89
  6. Step 6: Final answer
    x = 15,296.10

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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.