Home / 20,637.56-28,479.38-11,206.12

Finding the Fourth Proportional to 20,637.56, 28,479.38 and 11,206.12

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Solution

The fourth proportional to 20,637.56, 28,479.38 and 11,206.12 is: 15,464.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.56 : 28,479.38 = 11,206.12 : x
  2. Step 2: Convert to fraction form
    20,637.56/28,479.38 = 11,206.12/x
  3. Step 3: Cross multiply
    20,637.56x = 28,479.38 × 11,206.12
  4. Step 4: Simplify right side
    20,637.56x = 319,143,349.81
  5. Step 5: Solve for x
    x = 319,143,349.81/20,637.56
  6. Step 6: Final answer
    x = 15,464.20

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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.