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Finding the Fourth Proportional to 15,837.69, 21,855.10 and 8,763.76

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Solution

The fourth proportional to 15,837.69, 21,855.10 and 8,763.76 is: 12,093.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,837.69 : 21,855.10 = 8,763.76 : x
  2. Step 2: Convert to fraction form
    15,837.69/21,855.10 = 8,763.76/x
  3. Step 3: Cross multiply
    15,837.69x = 21,855.10 × 8,763.76
  4. Step 4: Simplify right side
    15,837.69x = 191,532,851.18
  5. Step 5: Solve for x
    x = 191,532,851.18/15,837.69
  6. Step 6: Final answer
    x = 12,093.48

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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.