Home / 5,390.40-8,081.28-2,470.08

Finding the Fourth Proportional to 5,390.40, 8,081.28 and 2,470.08

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Solution

The fourth proportional to 5,390.40, 8,081.28 and 2,470.08 is: 3,703.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.40 : 8,081.28 = 2,470.08 : x
  2. Step 2: Convert to fraction form
    5,390.40/8,081.28 = 2,470.08/x
  3. Step 3: Cross multiply
    5,390.40x = 8,081.28 × 2,470.08
  4. Step 4: Simplify right side
    5,390.40x = 19,961,408.10
  5. Step 5: Solve for x
    x = 19,961,408.10/5,390.40
  6. Step 6: Final answer
    x = 3,703.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.