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Finding the Fourth Proportional to 15,059.61, 20,782.56 and 8,772.39

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Solution

The fourth proportional to 15,059.61, 20,782.56 and 8,772.39 is: 12,106.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.61 : 20,782.56 = 8,772.39 : x
  2. Step 2: Convert to fraction form
    15,059.61/20,782.56 = 8,772.39/x
  3. Step 3: Cross multiply
    15,059.61x = 20,782.56 × 8,772.39
  4. Step 4: Simplify right side
    15,059.61x = 182,312,721.52
  5. Step 5: Solve for x
    x = 182,312,721.52/15,059.61
  6. Step 6: Final answer
    x = 12,106.07

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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.