Home / 15,856.53-21,882.27-8,686.32

Finding the Fourth Proportional to 15,856.53, 21,882.27 and 8,686.32

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Solution

The fourth proportional to 15,856.53, 21,882.27 and 8,686.32 is: 11,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.53 : 21,882.27 = 8,686.32 : x
  2. Step 2: Convert to fraction form
    15,856.53/21,882.27 = 8,686.32/x
  3. Step 3: Cross multiply
    15,856.53x = 21,882.27 × 8,686.32
  4. Step 4: Simplify right side
    15,856.53x = 190,076,399.55
  5. Step 5: Solve for x
    x = 190,076,399.55/15,856.53
  6. Step 6: Final answer
    x = 11,987.26

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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.