Home / 42,771.57-64,154.28-13,186.32

Finding the Fourth Proportional to 42,771.57, 64,154.28 and 13,186.32

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Solution

The fourth proportional to 42,771.57, 64,154.28 and 13,186.32 is: 19,778.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,771.57 : 64,154.28 = 13,186.32 : x
  2. Step 2: Convert to fraction form
    42,771.57/64,154.28 = 13,186.32/x
  3. Step 3: Cross multiply
    42,771.57x = 64,154.28 × 13,186.32
  4. Step 4: Simplify right side
    42,771.57x = 845,958,865.45
  5. Step 5: Solve for x
    x = 845,958,865.45/42,771.57
  6. Step 6: Final answer
    x = 19,778.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.