Home / 52,155.19-78,231.97-20,989.63

Finding the Fourth Proportional to 52,155.19, 78,231.97 and 20,989.63

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Solution

The fourth proportional to 52,155.19, 78,231.97 and 20,989.63 is: 31,484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,155.19 : 78,231.97 = 20,989.63 : x
  2. Step 2: Convert to fraction form
    52,155.19/78,231.97 = 20,989.63/x
  3. Step 3: Cross multiply
    52,155.19x = 78,231.97 × 20,989.63
  4. Step 4: Simplify right side
    52,155.19x = 1,642,059,608.36
  5. Step 5: Solve for x
    x = 1,642,059,608.36/52,155.19
  6. Step 6: Final answer
    x = 31,484.11

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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.