Home / 10,920.89-16,378.64-4,680.20

Finding the Fourth Proportional to 10,920.89, 16,378.64 and 4,680.20

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Solution

The fourth proportional to 10,920.89, 16,378.64 and 4,680.20 is: 7,019.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.89 : 16,378.64 = 4,680.20 : x
  2. Step 2: Convert to fraction form
    10,920.89/16,378.64 = 4,680.20/x
  3. Step 3: Cross multiply
    10,920.89x = 16,378.64 × 4,680.20
  4. Step 4: Simplify right side
    10,920.89x = 76,655,278.57
  5. Step 5: Solve for x
    x = 76,655,278.57/10,920.89
  6. Step 6: Final answer
    x = 7,019.14

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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.