Home / 52,155.81-78,232.91-20,990.25

Finding the Fourth Proportional to 52,155.81, 78,232.91 and 20,990.25

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Solution

The fourth proportional to 52,155.81, 78,232.91 and 20,990.25 is: 31,485.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,155.81 : 78,232.91 = 20,990.25 : x
  2. Step 2: Convert to fraction form
    52,155.81/78,232.91 = 20,990.25/x
  3. Step 3: Cross multiply
    52,155.81x = 78,232.91 × 20,990.25
  4. Step 4: Simplify right side
    52,155.81x = 1,642,128,234.18
  5. Step 5: Solve for x
    x = 1,642,128,234.18/52,155.81
  6. Step 6: Final answer
    x = 31,485.05

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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.