Home / 8,919.27-12,307.28-5,142.14

Finding the Fourth Proportional to 8,919.27, 12,307.28 and 5,142.14

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Solution

The fourth proportional to 8,919.27, 12,307.28 and 5,142.14 is: 7,095.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.27 : 12,307.28 = 5,142.14 : x
  2. Step 2: Convert to fraction form
    8,919.27/12,307.28 = 5,142.14/x
  3. Step 3: Cross multiply
    8,919.27x = 12,307.28 × 5,142.14
  4. Step 4: Simplify right side
    8,919.27x = 63,285,756.78
  5. Step 5: Solve for x
    x = 63,285,756.78/8,919.27
  6. Step 6: Final answer
    x = 7,095.40

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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.