Home / 20,559.61-28,357.59-12,905.11

Finding the Fourth Proportional to 20,559.61, 28,357.59 and 12,905.11

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Solution

The fourth proportional to 20,559.61, 28,357.59 and 12,905.11 is: 17,799.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.61 : 28,357.59 = 12,905.11 : x
  2. Step 2: Convert to fraction form
    20,559.61/28,357.59 = 12,905.11/x
  3. Step 3: Cross multiply
    20,559.61x = 28,357.59 × 12,905.11
  4. Step 4: Simplify right side
    20,559.61x = 365,957,818.28
  5. Step 5: Solve for x
    x = 365,957,818.28/20,559.61
  6. Step 6: Final answer
    x = 17,799.84

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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.