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Finding the Fourth Proportional to 19,493.28, 26,913.64 and 15,009.12

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Solution

The fourth proportional to 19,493.28, 26,913.64 and 15,009.12 is: 20,722.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,493.28 : 26,913.64 = 15,009.12 : x
  2. Step 2: Convert to fraction form
    19,493.28/26,913.64 = 15,009.12/x
  3. Step 3: Cross multiply
    19,493.28x = 26,913.64 × 15,009.12
  4. Step 4: Simplify right side
    19,493.28x = 403,950,052.40
  5. Step 5: Solve for x
    x = 403,950,052.40/19,493.28
  6. Step 6: Final answer
    x = 20,722.53

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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.