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Finding the Fourth Proportional to 12,665.59, 19,005.22 and 5,275.15

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Solution

The fourth proportional to 12,665.59, 19,005.22 and 5,275.15 is: 7,915.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.59 : 19,005.22 = 5,275.15 : x
  2. Step 2: Convert to fraction form
    12,665.59/19,005.22 = 5,275.15/x
  3. Step 3: Cross multiply
    12,665.59x = 19,005.22 × 5,275.15
  4. Step 4: Simplify right side
    12,665.59x = 100,255,345.36
  5. Step 5: Solve for x
    x = 100,255,345.36/12,665.59
  6. Step 6: Final answer
    x = 7,915.57

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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.