Home / 21,353.16-31,988.10-13,012.50

Finding the Fourth Proportional to 21,353.16, 31,988.10 and 13,012.50

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Solution

The fourth proportional to 21,353.16, 31,988.10 and 13,012.50 is: 19,493.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.16 : 31,988.10 = 13,012.50 : x
  2. Step 2: Convert to fraction form
    21,353.16/31,988.10 = 13,012.50/x
  3. Step 3: Cross multiply
    21,353.16x = 31,988.10 × 13,012.50
  4. Step 4: Simplify right side
    21,353.16x = 416,245,151.25
  5. Step 5: Solve for x
    x = 416,245,151.25/21,353.16
  6. Step 6: Final answer
    x = 19,493.37

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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.