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Finding the Fourth Proportional to 15,156.17, 20,918.19 and 9,495.77

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Solution

The fourth proportional to 15,156.17, 20,918.19 and 9,495.77 is: 13,105.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.17 : 20,918.19 = 9,495.77 : x
  2. Step 2: Convert to fraction form
    15,156.17/20,918.19 = 9,495.77/x
  3. Step 3: Cross multiply
    15,156.17x = 20,918.19 × 9,495.77
  4. Step 4: Simplify right side
    15,156.17x = 198,634,192.35
  5. Step 5: Solve for x
    x = 198,634,192.35/15,156.17
  6. Step 6: Final answer
    x = 13,105.83

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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.