Home / 15,402.66-21,255.64-8,688.26

Finding the Fourth Proportional to 15,402.66, 21,255.64 and 8,688.26

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Solution

The fourth proportional to 15,402.66, 21,255.64 and 8,688.26 is: 11,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.66 : 21,255.64 = 8,688.26 : x
  2. Step 2: Convert to fraction form
    15,402.66/21,255.64 = 8,688.26/x
  3. Step 3: Cross multiply
    15,402.66x = 21,255.64 × 8,688.26
  4. Step 4: Simplify right side
    15,402.66x = 184,674,526.79
  5. Step 5: Solve for x
    x = 184,674,526.79/15,402.66
  6. Step 6: Final answer
    x = 11,989.78

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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.