Home / 20,490-28,276.11-11,537.52

Finding the Fourth Proportional to 20,490, 28,276.11 and 11,537.52

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Solution

The fourth proportional to 20,490, 28,276.11 and 11,537.52 is: 15,921.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490 : 28,276.11 = 11,537.52 : x
  2. Step 2: Convert to fraction form
    20,490/28,276.11 = 11,537.52/x
  3. Step 3: Cross multiply
    20,490x = 28,276.11 × 11,537.52
  4. Step 4: Simplify right side
    20,490x = 326,236,184.65
  5. Step 5: Solve for x
    x = 326,236,184.65/20,490
  6. Step 6: Final answer
    x = 15,921.73

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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.