Home / 18,438.06-27,656.90-5,290.50

Finding the Fourth Proportional to 18,438.06, 27,656.90 and 5,290.50

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Solution

The fourth proportional to 18,438.06, 27,656.90 and 5,290.50 is: 7,935.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.06 : 27,656.90 = 5,290.50 : x
  2. Step 2: Convert to fraction form
    18,438.06/27,656.90 = 5,290.50/x
  3. Step 3: Cross multiply
    18,438.06x = 27,656.90 × 5,290.50
  4. Step 4: Simplify right side
    18,438.06x = 146,318,829.45
  5. Step 5: Solve for x
    x = 146,318,829.45/18,438.06
  6. Step 6: Final answer
    x = 7,935.70

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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.