Home / 20,722.19-28,596.63-11,290.76

Finding the Fourth Proportional to 20,722.19, 28,596.63 and 11,290.76

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Solution

The fourth proportional to 20,722.19, 28,596.63 and 11,290.76 is: 15,581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.19 : 28,596.63 = 11,290.76 : x
  2. Step 2: Convert to fraction form
    20,722.19/28,596.63 = 11,290.76/x
  3. Step 3: Cross multiply
    20,722.19x = 28,596.63 × 11,290.76
  4. Step 4: Simplify right side
    20,722.19x = 322,877,543.16
  5. Step 5: Solve for x
    x = 322,877,543.16/20,722.19
  6. Step 6: Final answer
    x = 15,581.25

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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.