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Finding the Fourth Proportional to 19,719.82, 29,428.80 and 17,616.20

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Solution

The fourth proportional to 19,719.82, 29,428.80 and 17,616.20 is: 26,289.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.82 : 29,428.80 = 17,616.20 : x
  2. Step 2: Convert to fraction form
    19,719.82/29,428.80 = 17,616.20/x
  3. Step 3: Cross multiply
    19,719.82x = 29,428.80 × 17,616.20
  4. Step 4: Simplify right side
    19,719.82x = 518,423,479.42
  5. Step 5: Solve for x
    x = 518,423,479.42/19,719.82
  6. Step 6: Final answer
    x = 26,289.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.