Home / 13,159.78-18,159.73-7,191.50

Finding the Fourth Proportional to 13,159.78, 18,159.73 and 7,191.50

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Solution

The fourth proportional to 13,159.78, 18,159.73 and 7,191.50 is: 9,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.78 : 18,159.73 = 7,191.50 : x
  2. Step 2: Convert to fraction form
    13,159.78/18,159.73 = 7,191.50/x
  3. Step 3: Cross multiply
    13,159.78x = 18,159.73 × 7,191.50
  4. Step 4: Simplify right side
    13,159.78x = 130,595,698.30
  5. Step 5: Solve for x
    x = 130,595,698.30/13,159.78
  6. Step 6: Final answer
    x = 9,923.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.