Home / 20,681.16-31,022.34-7,543.36

Finding the Fourth Proportional to 20,681.16, 31,022.34 and 7,543.36

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Solution

The fourth proportional to 20,681.16, 31,022.34 and 7,543.36 is: 11,315.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.16 : 31,022.34 = 7,543.36 : x
  2. Step 2: Convert to fraction form
    20,681.16/31,022.34 = 7,543.36/x
  3. Step 3: Cross multiply
    20,681.16x = 31,022.34 × 7,543.36
  4. Step 4: Simplify right side
    20,681.16x = 234,012,678.66
  5. Step 5: Solve for x
    x = 234,012,678.66/20,681.16
  6. Step 6: Final answer
    x = 11,315.26

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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.