Home / 9,135.06-12,605.49-5,155.50

Finding the Fourth Proportional to 9,135.06, 12,605.49 and 5,155.50

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Solution

The fourth proportional to 9,135.06, 12,605.49 and 5,155.50 is: 7,114.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.06 : 12,605.49 = 5,155.50 : x
  2. Step 2: Convert to fraction form
    9,135.06/12,605.49 = 5,155.50/x
  3. Step 3: Cross multiply
    9,135.06x = 12,605.49 × 5,155.50
  4. Step 4: Simplify right side
    9,135.06x = 64,987,603.70
  5. Step 5: Solve for x
    x = 64,987,603.70/9,135.06
  6. Step 6: Final answer
    x = 7,114.09

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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.