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Finding the Fourth Proportional to 19,398.68, 26,770.56 and 15,154.68

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Solution

The fourth proportional to 19,398.68, 26,770.56 and 15,154.68 is: 20,913.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.68 : 26,770.56 = 15,154.68 : x
  2. Step 2: Convert to fraction form
    19,398.68/26,770.56 = 15,154.68/x
  3. Step 3: Cross multiply
    19,398.68x = 26,770.56 × 15,154.68
  4. Step 4: Simplify right side
    19,398.68x = 405,699,270.22
  5. Step 5: Solve for x
    x = 405,699,270.22/19,398.68
  6. Step 6: Final answer
    x = 20,913.76

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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.