Home / 21,077.64-31,637.79-10,555.20

Finding the Fourth Proportional to 21,077.64, 31,637.79 and 10,555.20

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Solution

The fourth proportional to 21,077.64, 31,637.79 and 10,555.20 is: 15,843.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.64 : 31,637.79 = 10,555.20 : x
  2. Step 2: Convert to fraction form
    21,077.64/31,637.79 = 10,555.20/x
  3. Step 3: Cross multiply
    21,077.64x = 31,637.79 × 10,555.20
  4. Step 4: Simplify right side
    21,077.64x = 333,943,201.01
  5. Step 5: Solve for x
    x = 333,943,201.01/21,077.64
  6. Step 6: Final answer
    x = 15,843.48

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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.