Home / 13,031.78-19,538.40-10,561.15

Finding the Fourth Proportional to 13,031.78, 19,538.40 and 10,561.15

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Solution

The fourth proportional to 13,031.78, 19,538.40 and 10,561.15 is: 15,834.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,031.78 : 19,538.40 = 10,561.15 : x
  2. Step 2: Convert to fraction form
    13,031.78/19,538.40 = 10,561.15/x
  3. Step 3: Cross multiply
    13,031.78x = 19,538.40 × 10,561.15
  4. Step 4: Simplify right side
    13,031.78x = 206,347,924.31
  5. Step 5: Solve for x
    x = 206,347,924.31/13,031.78
  6. Step 6: Final answer
    x = 15,834.21

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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.