Home / 21,259.65-31,890-10,167.51

Finding the Fourth Proportional to 21,259.65, 31,890 and 10,167.51

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Solution

The fourth proportional to 21,259.65, 31,890 and 10,167.51 is: 15,251.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.65 : 31,890 = 10,167.51 : x
  2. Step 2: Convert to fraction form
    21,259.65/31,890 = 10,167.51/x
  3. Step 3: Cross multiply
    21,259.65x = 31,890 × 10,167.51
  4. Step 4: Simplify right side
    21,259.65x = 324,241,893.90
  5. Step 5: Solve for x
    x = 324,241,893.90/21,259.65
  6. Step 6: Final answer
    x = 15,251.52

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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.