Home / 7,981.75-11,009.54-4,992.40

Finding the Fourth Proportional to 7,981.75, 11,009.54 and 4,992.40

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Solution

The fourth proportional to 7,981.75, 11,009.54 and 4,992.40 is: 6,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.75 : 11,009.54 = 4,992.40 : x
  2. Step 2: Convert to fraction form
    7,981.75/11,009.54 = 4,992.40/x
  3. Step 3: Cross multiply
    7,981.75x = 11,009.54 × 4,992.40
  4. Step 4: Simplify right side
    7,981.75x = 54,963,947.49
  5. Step 5: Solve for x
    x = 54,963,947.49/7,981.75
  6. Step 6: Final answer
    x = 6,886.20

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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.