Home / 20,784.06-28,681.56-11,352.66

Finding the Fourth Proportional to 20,784.06, 28,681.56 and 11,352.66

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Solution

The fourth proportional to 20,784.06, 28,681.56 and 11,352.66 is: 15,666.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.06 : 28,681.56 = 11,352.66 : x
  2. Step 2: Convert to fraction form
    20,784.06/28,681.56 = 11,352.66/x
  3. Step 3: Cross multiply
    20,784.06x = 28,681.56 × 11,352.66
  4. Step 4: Simplify right side
    20,784.06x = 325,611,998.95
  5. Step 5: Solve for x
    x = 325,611,998.95/20,784.06
  6. Step 6: Final answer
    x = 15,666.43

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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.