Home / 20,911.17-28,844.74-12,407.69

Finding the Fourth Proportional to 20,911.17, 28,844.74 and 12,407.69

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Solution

The fourth proportional to 20,911.17, 28,844.74 and 12,407.69 is: 17,115.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.17 : 28,844.74 = 12,407.69 : x
  2. Step 2: Convert to fraction form
    20,911.17/28,844.74 = 12,407.69/x
  3. Step 3: Cross multiply
    20,911.17x = 28,844.74 × 12,407.69
  4. Step 4: Simplify right side
    20,911.17x = 357,896,679.67
  5. Step 5: Solve for x
    x = 357,896,679.67/20,911.17
  6. Step 6: Final answer
    x = 17,115.09

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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.