Home / 15,395.72-21,246.30-8,681.49

Finding the Fourth Proportional to 15,395.72, 21,246.30 and 8,681.49

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Solution

The fourth proportional to 15,395.72, 21,246.30 and 8,681.49 is: 11,980.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,395.72 : 21,246.30 = 8,681.49 : x
  2. Step 2: Convert to fraction form
    15,395.72/21,246.30 = 8,681.49/x
  3. Step 3: Cross multiply
    15,395.72x = 21,246.30 × 8,681.49
  4. Step 4: Simplify right side
    15,395.72x = 184,449,540.99
  5. Step 5: Solve for x
    x = 184,449,540.99/15,395.72
  6. Step 6: Final answer
    x = 11,980.58

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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.