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Finding the Fourth Proportional to 19,359, 26,720.28 and 11,398.32

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Solution

The fourth proportional to 19,359, 26,720.28 and 11,398.32 is: 15,732.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,359 : 26,720.28 = 11,398.32 : x
  2. Step 2: Convert to fraction form
    19,359/26,720.28 = 11,398.32/x
  3. Step 3: Cross multiply
    19,359x = 26,720.28 × 11,398.32
  4. Step 4: Simplify right side
    19,359x = 304,566,301.93
  5. Step 5: Solve for x
    x = 304,566,301.93/19,359
  6. Step 6: Final answer
    x = 15,732.54

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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.