Home / 20,772.09-31,132.22-10,386.81

Finding the Fourth Proportional to 20,772.09, 31,132.22 and 10,386.81

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Solution

The fourth proportional to 20,772.09, 31,132.22 and 10,386.81 is: 15,567.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.09 : 31,132.22 = 10,386.81 : x
  2. Step 2: Convert to fraction form
    20,772.09/31,132.22 = 10,386.81/x
  3. Step 3: Cross multiply
    20,772.09x = 31,132.22 × 10,386.81
  4. Step 4: Simplify right side
    20,772.09x = 323,364,402.08
  5. Step 5: Solve for x
    x = 323,364,402.08/20,772.09
  6. Step 6: Final answer
    x = 15,567.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.