Home / 20,513.15-28,308.74-11,560.16

Finding the Fourth Proportional to 20,513.15, 28,308.74 and 11,560.16

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Solution

The fourth proportional to 20,513.15, 28,308.74 and 11,560.16 is: 15,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.15 : 28,308.74 = 11,560.16 : x
  2. Step 2: Convert to fraction form
    20,513.15/28,308.74 = 11,560.16/x
  3. Step 3: Cross multiply
    20,513.15x = 28,308.74 × 11,560.16
  4. Step 4: Simplify right side
    20,513.15x = 327,253,563.80
  5. Step 5: Solve for x
    x = 327,253,563.80/20,513.15
  6. Step 6: Final answer
    x = 15,953.35

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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.