Home / 2,167.17-2,989.35-1,421.43

Finding the Fourth Proportional to 2,167.17, 2,989.35 and 1,421.43

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Solution

The fourth proportional to 2,167.17, 2,989.35 and 1,421.43 is: 1,960.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.17 : 2,989.35 = 1,421.43 : x
  2. Step 2: Convert to fraction form
    2,167.17/2,989.35 = 1,421.43/x
  3. Step 3: Cross multiply
    2,167.17x = 2,989.35 × 1,421.43
  4. Step 4: Simplify right side
    2,167.17x = 4,249,151.77
  5. Step 5: Solve for x
    x = 4,249,151.77/2,167.17
  6. Step 6: Final answer
    x = 1,960.69

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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.