Home / 8,921.88-12,312.36-4,943.12

Finding the Fourth Proportional to 8,921.88, 12,312.36 and 4,943.12

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Solution

The fourth proportional to 8,921.88, 12,312.36 and 4,943.12 is: 6,821.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.88 : 12,312.36 = 4,943.12 : x
  2. Step 2: Convert to fraction form
    8,921.88/12,312.36 = 4,943.12/x
  3. Step 3: Cross multiply
    8,921.88x = 12,312.36 × 4,943.12
  4. Step 4: Simplify right side
    8,921.88x = 60,861,411.40
  5. Step 5: Solve for x
    x = 60,861,411.40/8,921.88
  6. Step 6: Final answer
    x = 6,821.59

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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.