Home / 2,160.12-2,981.92-1,575.12

Finding the Fourth Proportional to 2,160.12, 2,981.92 and 1,575.12

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Solution

The fourth proportional to 2,160.12, 2,981.92 and 1,575.12 is: 2,174.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.12 : 2,981.92 = 1,575.12 : x
  2. Step 2: Convert to fraction form
    2,160.12/2,981.92 = 1,575.12/x
  3. Step 3: Cross multiply
    2,160.12x = 2,981.92 × 1,575.12
  4. Step 4: Simplify right side
    2,160.12x = 4,696,881.83
  5. Step 5: Solve for x
    x = 4,696,881.83/2,160.12
  6. Step 6: Final answer
    x = 2,174.36

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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.