Home / 15,795.78-21,798.04-8,721.76

Finding the Fourth Proportional to 15,795.78, 21,798.04 and 8,721.76

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Solution

The fourth proportional to 15,795.78, 21,798.04 and 8,721.76 is: 12,035.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.78 : 21,798.04 = 8,721.76 : x
  2. Step 2: Convert to fraction form
    15,795.78/21,798.04 = 8,721.76/x
  3. Step 3: Cross multiply
    15,795.78x = 21,798.04 × 8,721.76
  4. Step 4: Simplify right side
    15,795.78x = 190,117,273.35
  5. Step 5: Solve for x
    x = 190,117,273.35/15,795.78
  6. Step 6: Final answer
    x = 12,035.95

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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.