Home / 20,696.72-28,587.12-15,022.40

Finding the Fourth Proportional to 20,696.72, 28,587.12 and 15,022.40

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Solution

The fourth proportional to 20,696.72, 28,587.12 and 15,022.40 is: 20,749.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.72 : 28,587.12 = 15,022.40 : x
  2. Step 2: Convert to fraction form
    20,696.72/28,587.12 = 15,022.40/x
  3. Step 3: Cross multiply
    20,696.72x = 28,587.12 × 15,022.40
  4. Step 4: Simplify right side
    20,696.72x = 429,447,151.49
  5. Step 5: Solve for x
    x = 429,447,151.49/20,696.72
  6. Step 6: Final answer
    x = 20,749.53

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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.