Home / 12,578.60-18,878.70-5,569.40

Finding the Fourth Proportional to 12,578.60, 18,878.70 and 5,569.40

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Solution

The fourth proportional to 12,578.60, 18,878.70 and 5,569.40 is: 8,358.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.60 : 18,878.70 = 5,569.40 : x
  2. Step 2: Convert to fraction form
    12,578.60/18,878.70 = 5,569.40/x
  3. Step 3: Cross multiply
    12,578.60x = 18,878.70 × 5,569.40
  4. Step 4: Simplify right side
    12,578.60x = 105,143,031.78
  5. Step 5: Solve for x
    x = 105,143,031.78/12,578.60
  6. Step 6: Final answer
    x = 8,358.88

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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.