Home / 20,378.76-28,139.31-16,602.54

Finding the Fourth Proportional to 20,378.76, 28,139.31 and 16,602.54

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Solution

The fourth proportional to 20,378.76, 28,139.31 and 16,602.54 is: 22,925.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.76 : 28,139.31 = 16,602.54 : x
  2. Step 2: Convert to fraction form
    20,378.76/28,139.31 = 16,602.54/x
  3. Step 3: Cross multiply
    20,378.76x = 28,139.31 × 16,602.54
  4. Step 4: Simplify right side
    20,378.76x = 467,184,019.85
  5. Step 5: Solve for x
    x = 467,184,019.85/20,378.76
  6. Step 6: Final answer
    x = 22,925.05

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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.