Home / 20,356.77-30,531.50-7,209.21

Finding the Fourth Proportional to 20,356.77, 30,531.50 and 7,209.21

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Solution

The fourth proportional to 20,356.77, 30,531.50 and 7,209.21 is: 10,812.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.77 : 30,531.50 = 7,209.21 : x
  2. Step 2: Convert to fraction form
    20,356.77/30,531.50 = 7,209.21/x
  3. Step 3: Cross multiply
    20,356.77x = 30,531.50 × 7,209.21
  4. Step 4: Simplify right side
    20,356.77x = 220,107,959.07
  5. Step 5: Solve for x
    x = 220,107,959.07/20,356.77
  6. Step 6: Final answer
    x = 10,812.52

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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.