Home / 20,888.74-28,826.91-11,457.28

Finding the Fourth Proportional to 20,888.74, 28,826.91 and 11,457.28

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Solution

The fourth proportional to 20,888.74, 28,826.91 and 11,457.28 is: 15,811.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.74 : 28,826.91 = 11,457.28 : x
  2. Step 2: Convert to fraction form
    20,888.74/28,826.91 = 11,457.28/x
  3. Step 3: Cross multiply
    20,888.74x = 28,826.91 × 11,457.28
  4. Step 4: Simplify right side
    20,888.74x = 330,277,979.40
  5. Step 5: Solve for x
    x = 330,277,979.40/20,888.74
  6. Step 6: Final answer
    x = 15,811.29

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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.