Home / 21,120.18-31,686.27-10,577.49

Finding the Fourth Proportional to 21,120.18, 31,686.27 and 10,577.49

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Solution

The fourth proportional to 21,120.18, 31,686.27 and 10,577.49 is: 15,869.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.18 : 31,686.27 = 10,577.49 : x
  2. Step 2: Convert to fraction form
    21,120.18/31,686.27 = 10,577.49/x
  3. Step 3: Cross multiply
    21,120.18x = 31,686.27 × 10,577.49
  4. Step 4: Simplify right side
    21,120.18x = 335,161,204.06
  5. Step 5: Solve for x
    x = 335,161,204.06/21,120.18
  6. Step 6: Final answer
    x = 15,869.24

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1.5x scale

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.