Home / 5,291.13-7,890.12-4,921.77

Finding the Fourth Proportional to 5,291.13, 7,890.12 and 4,921.77

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Solution

The fourth proportional to 5,291.13, 7,890.12 and 4,921.77 is: 7,339.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,291.13 : 7,890.12 = 4,921.77 : x
  2. Step 2: Convert to fraction form
    5,291.13/7,890.12 = 4,921.77/x
  3. Step 3: Cross multiply
    5,291.13x = 7,890.12 × 4,921.77
  4. Step 4: Simplify right side
    5,291.13x = 38,833,331.30
  5. Step 5: Solve for x
    x = 38,833,331.30/5,291.13
  6. Step 6: Final answer
    x = 7,339.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.