Home / 5,143.20-7,106.40-4,578.72

Finding the Fourth Proportional to 5,143.20, 7,106.40 and 4,578.72

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Solution

The fourth proportional to 5,143.20, 7,106.40 and 4,578.72 is: 6,326.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.20 : 7,106.40 = 4,578.72 : x
  2. Step 2: Convert to fraction form
    5,143.20/7,106.40 = 4,578.72/x
  3. Step 3: Cross multiply
    5,143.20x = 7,106.40 × 4,578.72
  4. Step 4: Simplify right side
    5,143.20x = 32,538,215.81
  5. Step 5: Solve for x
    x = 32,538,215.81/5,143.20
  6. Step 6: Final answer
    x = 6,326.45

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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.