Home / 15,511.13-21,395.78-13,526.43

Finding the Fourth Proportional to 15,511.13, 21,395.78 and 13,526.43

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Solution

The fourth proportional to 15,511.13, 21,395.78 and 13,526.43 is: 18,658.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.13 : 21,395.78 = 13,526.43 : x
  2. Step 2: Convert to fraction form
    15,511.13/21,395.78 = 13,526.43/x
  3. Step 3: Cross multiply
    15,511.13x = 21,395.78 × 13,526.43
  4. Step 4: Simplify right side
    15,511.13x = 289,408,520.47
  5. Step 5: Solve for x
    x = 289,408,520.47/15,511.13
  6. Step 6: Final answer
    x = 18,658.12

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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.