Home / 21,018.82-31,547.67-10,637.86

Finding the Fourth Proportional to 21,018.82, 31,547.67 and 10,637.86

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Solution

The fourth proportional to 21,018.82, 31,547.67 and 10,637.86 is: 15,966.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.82 : 31,547.67 = 10,637.86 : x
  2. Step 2: Convert to fraction form
    21,018.82/31,547.67 = 10,637.86/x
  3. Step 3: Cross multiply
    21,018.82x = 31,547.67 × 10,637.86
  4. Step 4: Simplify right side
    21,018.82x = 335,599,696.79
  5. Step 5: Solve for x
    x = 335,599,696.79/21,018.82
  6. Step 6: Final answer
    x = 15,966.63

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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.