Home / 2,117.13-2,921-1,369.90

Finding the Fourth Proportional to 2,117.13, 2,921 and 1,369.90

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Solution

The fourth proportional to 2,117.13, 2,921 and 1,369.90 is: 1,890.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.13 : 2,921 = 1,369.90 : x
  2. Step 2: Convert to fraction form
    2,117.13/2,921 = 1,369.90/x
  3. Step 3: Cross multiply
    2,117.13x = 2,921 × 1,369.90
  4. Step 4: Simplify right side
    2,117.13x = 4,001,477.90
  5. Step 5: Solve for x
    x = 4,001,477.90/2,117.13
  6. Step 6: Final answer
    x = 1,890.05

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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.