Home / 15,389.92-21,241.36-9,724.24

Finding the Fourth Proportional to 15,389.92, 21,241.36 and 9,724.24

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Solution

The fourth proportional to 15,389.92, 21,241.36 and 9,724.24 is: 13,421.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.92 : 21,241.36 = 9,724.24 : x
  2. Step 2: Convert to fraction form
    15,389.92/21,241.36 = 9,724.24/x
  3. Step 3: Cross multiply
    15,389.92x = 21,241.36 × 9,724.24
  4. Step 4: Simplify right side
    15,389.92x = 206,556,082.57
  5. Step 5: Solve for x
    x = 206,556,082.57/15,389.92
  6. Step 6: Final answer
    x = 13,421.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.