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Finding the Fourth Proportional to 18,891.76, 26,070.24 and 10,507.72

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Solution

The fourth proportional to 18,891.76, 26,070.24 and 10,507.72 is: 14,500.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.76 : 26,070.24 = 10,507.72 : x
  2. Step 2: Convert to fraction form
    18,891.76/26,070.24 = 10,507.72/x
  3. Step 3: Cross multiply
    18,891.76x = 26,070.24 × 10,507.72
  4. Step 4: Simplify right side
    18,891.76x = 273,938,782.25
  5. Step 5: Solve for x
    x = 273,938,782.25/18,891.76
  6. Step 6: Final answer
    x = 14,500.44

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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.