Home / 15,679.34-21,637.56-8,509.17

Finding the Fourth Proportional to 15,679.34, 21,637.56 and 8,509.17

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Solution

The fourth proportional to 15,679.34, 21,637.56 and 8,509.17 is: 11,742.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.34 : 21,637.56 = 8,509.17 : x
  2. Step 2: Convert to fraction form
    15,679.34/21,637.56 = 8,509.17/x
  3. Step 3: Cross multiply
    15,679.34x = 21,637.56 × 8,509.17
  4. Step 4: Simplify right side
    15,679.34x = 184,117,676.43
  5. Step 5: Solve for x
    x = 184,117,676.43/15,679.34
  6. Step 6: Final answer
    x = 11,742.69

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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.