Home / 21,113.11-29,135.87-11,681.74

Finding the Fourth Proportional to 21,113.11, 29,135.87 and 11,681.74

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Solution

The fourth proportional to 21,113.11, 29,135.87 and 11,681.74 is: 16,120.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.11 : 29,135.87 = 11,681.74 : x
  2. Step 2: Convert to fraction form
    21,113.11/29,135.87 = 11,681.74/x
  3. Step 3: Cross multiply
    21,113.11x = 29,135.87 × 11,681.74
  4. Step 4: Simplify right side
    21,113.11x = 340,357,658.01
  5. Step 5: Solve for x
    x = 340,357,658.01/21,113.11
  6. Step 6: Final answer
    x = 16,120.68

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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.