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Finding the Fourth Proportional to 20,698.88, 28,564.47 and 11,267.46

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Solution

The fourth proportional to 20,698.88, 28,564.47 and 11,267.46 is: 15,549.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.88 : 28,564.47 = 11,267.46 : x
  2. Step 2: Convert to fraction form
    20,698.88/28,564.47 = 11,267.46/x
  3. Step 3: Cross multiply
    20,698.88x = 28,564.47 × 11,267.46
  4. Step 4: Simplify right side
    20,698.88x = 321,849,023.15
  5. Step 5: Solve for x
    x = 321,849,023.15/20,698.88
  6. Step 6: Final answer
    x = 15,549.10

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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.