Home / 20,988.64-28,964.48-11,557.52

Finding the Fourth Proportional to 20,988.64, 28,964.48 and 11,557.52

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Solution

The fourth proportional to 20,988.64, 28,964.48 and 11,557.52 is: 15,949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.64 : 28,964.48 = 11,557.52 : x
  2. Step 2: Convert to fraction form
    20,988.64/28,964.48 = 11,557.52/x
  3. Step 3: Cross multiply
    20,988.64x = 28,964.48 × 11,557.52
  4. Step 4: Simplify right side
    20,988.64x = 334,757,556.89
  5. Step 5: Solve for x
    x = 334,757,556.89/20,988.64
  6. Step 6: Final answer
    x = 15,949.46

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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.