Home / 21,019.07-31,548.29-10,638.11

Finding the Fourth Proportional to 21,019.07, 31,548.29 and 10,638.11

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Solution

The fourth proportional to 21,019.07, 31,548.29 and 10,638.11 is: 15,967.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.07 : 31,548.29 = 10,638.11 : x
  2. Step 2: Convert to fraction form
    21,019.07/31,548.29 = 10,638.11/x
  3. Step 3: Cross multiply
    21,019.07x = 31,548.29 × 10,638.11
  4. Step 4: Simplify right side
    21,019.07x = 335,614,126.14
  5. Step 5: Solve for x
    x = 335,614,126.14/21,019.07
  6. Step 6: Final answer
    x = 15,967.13

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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.