Home / 12,139.79-18,210.68-3,374.71

Finding the Fourth Proportional to 12,139.79, 18,210.68 and 3,374.71

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Solution

The fourth proportional to 12,139.79, 18,210.68 and 3,374.71 is: 5,062.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.79 : 18,210.68 = 3,374.71 : x
  2. Step 2: Convert to fraction form
    12,139.79/18,210.68 = 3,374.71/x
  3. Step 3: Cross multiply
    12,139.79x = 18,210.68 × 3,374.71
  4. Step 4: Simplify right side
    12,139.79x = 61,455,763.90
  5. Step 5: Solve for x
    x = 61,455,763.90/12,139.79
  6. Step 6: Final answer
    x = 5,062.34

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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.