Home / 21,020.51-31,534.50-6,981.38

Finding the Fourth Proportional to 21,020.51, 31,534.50 and 6,981.38

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Solution

The fourth proportional to 21,020.51, 31,534.50 and 6,981.38 is: 10,473.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.51 : 31,534.50 = 6,981.38 : x
  2. Step 2: Convert to fraction form
    21,020.51/31,534.50 = 6,981.38/x
  3. Step 3: Cross multiply
    21,020.51x = 31,534.50 × 6,981.38
  4. Step 4: Simplify right side
    21,020.51x = 220,154,327.61
  5. Step 5: Solve for x
    x = 220,154,327.61/21,020.51
  6. Step 6: Final answer
    x = 10,473.31

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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.