Home / 21,001.25-31,502.01-5,419.01

Finding the Fourth Proportional to 21,001.25, 31,502.01 and 5,419.01

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Solution

The fourth proportional to 21,001.25, 31,502.01 and 5,419.01 is: 8,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.25 : 31,502.01 = 5,419.01 : x
  2. Step 2: Convert to fraction form
    21,001.25/31,502.01 = 5,419.01/x
  3. Step 3: Cross multiply
    21,001.25x = 31,502.01 × 5,419.01
  4. Step 4: Simplify right side
    21,001.25x = 170,709,707.21
  5. Step 5: Solve for x
    x = 170,709,707.21/21,001.25
  6. Step 6: Final answer
    x = 8,128.55

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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.