Home / 20,557.40-28,369.35-12,064.55

Finding the Fourth Proportional to 20,557.40, 28,369.35 and 12,064.55

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Solution

The fourth proportional to 20,557.40, 28,369.35 and 12,064.55 is: 16,649.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.40 : 28,369.35 = 12,064.55 : x
  2. Step 2: Convert to fraction form
    20,557.40/28,369.35 = 12,064.55/x
  3. Step 3: Cross multiply
    20,557.40x = 28,369.35 × 12,064.55
  4. Step 4: Simplify right side
    20,557.40x = 342,263,299.70
  5. Step 5: Solve for x
    x = 342,263,299.70/20,557.40
  6. Step 6: Final answer
    x = 16,649.16

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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.