Home / 20,885.63-28,823.99-11,456.01

Finding the Fourth Proportional to 20,885.63, 28,823.99 and 11,456.01

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Solution

The fourth proportional to 20,885.63, 28,823.99 and 11,456.01 is: 15,810.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.63 : 28,823.99 = 11,456.01 : x
  2. Step 2: Convert to fraction form
    20,885.63/28,823.99 = 11,456.01/x
  3. Step 3: Cross multiply
    20,885.63x = 28,823.99 × 11,456.01
  4. Step 4: Simplify right side
    20,885.63x = 330,207,860.40
  5. Step 5: Solve for x
    x = 330,207,860.40/20,885.63
  6. Step 6: Final answer
    x = 15,810.29

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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.