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Finding the Fourth Proportional to 19,719.61, 29,428.49 and 17,615.99

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Solution

The fourth proportional to 19,719.61, 29,428.49 and 17,615.99 is: 26,289.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.61 : 29,428.49 = 17,615.99 : x
  2. Step 2: Convert to fraction form
    19,719.61/29,428.49 = 17,615.99/x
  3. Step 3: Cross multiply
    19,719.61x = 29,428.49 × 17,615.99
  4. Step 4: Simplify right side
    19,719.61x = 518,411,897.48
  5. Step 5: Solve for x
    x = 518,411,897.48/19,719.61
  6. Step 6: Final answer
    x = 26,289.16

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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.