Home / 7,981.40-11,015.36-4,579.74

Finding the Fourth Proportional to 7,981.40, 11,015.36 and 4,579.74

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Solution

The fourth proportional to 7,981.40, 11,015.36 and 4,579.74 is: 6,320.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.40 : 11,015.36 = 4,579.74 : x
  2. Step 2: Convert to fraction form
    7,981.40/11,015.36 = 4,579.74/x
  3. Step 3: Cross multiply
    7,981.40x = 11,015.36 × 4,579.74
  4. Step 4: Simplify right side
    7,981.40x = 50,447,484.81
  5. Step 5: Solve for x
    x = 50,447,484.81/7,981.40
  6. Step 6: Final answer
    x = 6,320.63

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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.