Home / 20,802.76-31,203.78-5,220.16

Finding the Fourth Proportional to 20,802.76, 31,203.78 and 5,220.16

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Solution

The fourth proportional to 20,802.76, 31,203.78 and 5,220.16 is: 7,830.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.76 : 31,203.78 = 5,220.16 : x
  2. Step 2: Convert to fraction form
    20,802.76/31,203.78 = 5,220.16/x
  3. Step 3: Cross multiply
    20,802.76x = 31,203.78 × 5,220.16
  4. Step 4: Simplify right side
    20,802.76x = 162,888,724.20
  5. Step 5: Solve for x
    x = 162,888,724.20/20,802.76
  6. Step 6: Final answer
    x = 7,830.15

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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.