Home / 12,210.20-18,302.51-5,640.69

Finding the Fourth Proportional to 12,210.20, 18,302.51 and 5,640.69

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Solution

The fourth proportional to 12,210.20, 18,302.51 and 5,640.69 is: 8,455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.20 : 18,302.51 = 5,640.69 : x
  2. Step 2: Convert to fraction form
    12,210.20/18,302.51 = 5,640.69/x
  3. Step 3: Cross multiply
    12,210.20x = 18,302.51 × 5,640.69
  4. Step 4: Simplify right side
    12,210.20x = 103,238,756.93
  5. Step 5: Solve for x
    x = 103,238,756.93/12,210.20
  6. Step 6: Final answer
    x = 8,455.13

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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.