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Finding the Fourth Proportional to 20,215.71, 27,897.71 and 11,263.53

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Solution

The fourth proportional to 20,215.71, 27,897.71 and 11,263.53 is: 15,543.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.71 : 27,897.71 = 11,263.53 : x
  2. Step 2: Convert to fraction form
    20,215.71/27,897.71 = 11,263.53/x
  3. Step 3: Cross multiply
    20,215.71x = 27,897.71 × 11,263.53
  4. Step 4: Simplify right side
    20,215.71x = 314,226,525.87
  5. Step 5: Solve for x
    x = 314,226,525.87/20,215.71
  6. Step 6: Final answer
    x = 15,543.68

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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.