Home / 21,113.54-31,681.25-15,317.99

Finding the Fourth Proportional to 21,113.54, 31,681.25 and 15,317.99

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Solution

The fourth proportional to 21,113.54, 31,681.25 and 15,317.99 is: 22,984.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.54 : 31,681.25 = 15,317.99 : x
  2. Step 2: Convert to fraction form
    21,113.54/31,681.25 = 15,317.99/x
  3. Step 3: Cross multiply
    21,113.54x = 31,681.25 × 15,317.99
  4. Step 4: Simplify right side
    21,113.54x = 485,293,070.69
  5. Step 5: Solve for x
    x = 485,293,070.69/21,113.54
  6. Step 6: Final answer
    x = 22,984.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.