Home / 20,899.15-28,839.95-11,467.10

Finding the Fourth Proportional to 20,899.15, 28,839.95 and 11,467.10

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Solution

The fourth proportional to 20,899.15, 28,839.95 and 11,467.10 is: 15,824.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.15 : 28,839.95 = 11,467.10 : x
  2. Step 2: Convert to fraction form
    20,899.15/28,839.95 = 11,467.10/x
  3. Step 3: Cross multiply
    20,899.15x = 28,839.95 × 11,467.10
  4. Step 4: Simplify right side
    20,899.15x = 330,710,648.41
  5. Step 5: Solve for x
    x = 330,710,648.41/20,899.15
  6. Step 6: Final answer
    x = 15,824.12

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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.