Home / 21,316-29,420.28-12,365.44

Finding the Fourth Proportional to 21,316, 29,420.28 and 12,365.44

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Solution

The fourth proportional to 21,316, 29,420.28 and 12,365.44 is: 17,066.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316 : 29,420.28 = 12,365.44 : x
  2. Step 2: Convert to fraction form
    21,316/29,420.28 = 12,365.44/x
  3. Step 3: Cross multiply
    21,316x = 29,420.28 × 12,365.44
  4. Step 4: Simplify right side
    21,316x = 363,794,707.12
  5. Step 5: Solve for x
    x = 363,794,707.12/21,316
  6. Step 6: Final answer
    x = 17,066.74

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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.