Home / 20,641.23-28,486.76-11,690.91

Finding the Fourth Proportional to 20,641.23, 28,486.76 and 11,690.91

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Solution

The fourth proportional to 20,641.23, 28,486.76 and 11,690.91 is: 16,134.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.23 : 28,486.76 = 11,690.91 : x
  2. Step 2: Convert to fraction form
    20,641.23/28,486.76 = 11,690.91/x
  3. Step 3: Cross multiply
    20,641.23x = 28,486.76 × 11,690.91
  4. Step 4: Simplify right side
    20,641.23x = 333,036,088.90
  5. Step 5: Solve for x
    x = 333,036,088.90/20,641.23
  6. Step 6: Final answer
    x = 16,134.51

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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.