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Finding the Fourth Proportional to 18,897.68, 26,079.72 and 10,938.48

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Solution

The fourth proportional to 18,897.68, 26,079.72 and 10,938.48 is: 15,095.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.68 : 26,079.72 = 10,938.48 : x
  2. Step 2: Convert to fraction form
    18,897.68/26,079.72 = 10,938.48/x
  3. Step 3: Cross multiply
    18,897.68x = 26,079.72 × 10,938.48
  4. Step 4: Simplify right side
    18,897.68x = 285,272,495.63
  5. Step 5: Solve for x
    x = 285,272,495.63/18,897.68
  6. Step 6: Final answer
    x = 15,095.64

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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.