Home / 2,981.71-4,113.05-1,860.70

Finding the Fourth Proportional to 2,981.71, 4,113.05 and 1,860.70

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Solution

The fourth proportional to 2,981.71, 4,113.05 and 1,860.70 is: 2,566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.71 : 4,113.05 = 1,860.70 : x
  2. Step 2: Convert to fraction form
    2,981.71/4,113.05 = 1,860.70/x
  3. Step 3: Cross multiply
    2,981.71x = 4,113.05 × 1,860.70
  4. Step 4: Simplify right side
    2,981.71x = 7,653,152.14
  5. Step 5: Solve for x
    x = 7,653,152.14/2,981.71
  6. Step 6: Final answer
    x = 2,566.70

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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.