Home / 20,784.11-28,681.89-11,352.47

Finding the Fourth Proportional to 20,784.11, 28,681.89 and 11,352.47

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Solution

The fourth proportional to 20,784.11, 28,681.89 and 11,352.47 is: 15,666.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.11 : 28,681.89 = 11,352.47 : x
  2. Step 2: Convert to fraction form
    20,784.11/28,681.89 = 11,352.47/x
  3. Step 3: Cross multiply
    20,784.11x = 28,681.89 × 11,352.47
  4. Step 4: Simplify right side
    20,784.11x = 325,610,367.47
  5. Step 5: Solve for x
    x = 325,610,367.47/20,784.11
  6. Step 6: Final answer
    x = 15,666.31

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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.