Home / 21,360.38-29,263.23-20,561.74

Finding the Fourth Proportional to 21,360.38, 29,263.23 and 20,561.74

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Solution

The fourth proportional to 21,360.38, 29,263.23 and 20,561.74 is: 28,169.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.38 : 29,263.23 = 20,561.74 : x
  2. Step 2: Convert to fraction form
    21,360.38/29,263.23 = 20,561.74/x
  3. Step 3: Cross multiply
    21,360.38x = 29,263.23 × 20,561.74
  4. Step 4: Simplify right side
    21,360.38x = 601,703,014.80
  5. Step 5: Solve for x
    x = 601,703,014.80/21,360.38
  6. Step 6: Final answer
    x = 28,169.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.