Home / 9,187.18-12,678.57-5,208.13

Finding the Fourth Proportional to 9,187.18, 12,678.57 and 5,208.13

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Solution

The fourth proportional to 9,187.18, 12,678.57 and 5,208.13 is: 7,187.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.18 : 12,678.57 = 5,208.13 : x
  2. Step 2: Convert to fraction form
    9,187.18/12,678.57 = 5,208.13/x
  3. Step 3: Cross multiply
    9,187.18x = 12,678.57 × 5,208.13
  4. Step 4: Simplify right side
    9,187.18x = 66,031,640.77
  5. Step 5: Solve for x
    x = 66,031,640.77/9,187.18
  6. Step 6: Final answer
    x = 7,187.37

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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.