Home / 15,512.79-21,407.53-8,439.22

Finding the Fourth Proportional to 15,512.79, 21,407.53 and 8,439.22

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Solution

The fourth proportional to 15,512.79, 21,407.53 and 8,439.22 is: 11,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.79 : 21,407.53 = 8,439.22 : x
  2. Step 2: Convert to fraction form
    15,512.79/21,407.53 = 8,439.22/x
  3. Step 3: Cross multiply
    15,512.79x = 21,407.53 × 8,439.22
  4. Step 4: Simplify right side
    15,512.79x = 180,662,706.09
  5. Step 5: Solve for x
    x = 180,662,706.09/15,512.79
  6. Step 6: Final answer
    x = 11,646.05

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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.