Home / 20,740.55-31,110.80-5,158.17

Finding the Fourth Proportional to 20,740.55, 31,110.80 and 5,158.17

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Solution

The fourth proportional to 20,740.55, 31,110.80 and 5,158.17 is: 7,737.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.55 : 31,110.80 = 5,158.17 : x
  2. Step 2: Convert to fraction form
    20,740.55/31,110.80 = 5,158.17/x
  3. Step 3: Cross multiply
    20,740.55x = 31,110.80 × 5,158.17
  4. Step 4: Simplify right side
    20,740.55x = 160,474,769.45
  5. Step 5: Solve for x
    x = 160,474,769.45/20,740.55
  6. Step 6: Final answer
    x = 7,737.25

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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.