Home / 15,856.04-21,881.79-9,143.78

Finding the Fourth Proportional to 15,856.04, 21,881.79 and 9,143.78

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Solution

The fourth proportional to 15,856.04, 21,881.79 and 9,143.78 is: 12,618.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.04 : 21,881.79 = 9,143.78 : x
  2. Step 2: Convert to fraction form
    15,856.04/21,881.79 = 9,143.78/x
  3. Step 3: Cross multiply
    15,856.04x = 21,881.79 × 9,143.78
  4. Step 4: Simplify right side
    15,856.04x = 200,082,164.36
  5. Step 5: Solve for x
    x = 200,082,164.36/15,856.04
  6. Step 6: Final answer
    x = 12,618.68

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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.