Home / 42,749.76-64,137.60-20,556.84

Finding the Fourth Proportional to 42,749.76, 64,137.60 and 20,556.84

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Solution

The fourth proportional to 42,749.76, 64,137.60 and 20,556.84 is: 30,841.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,749.76 : 64,137.60 = 20,556.84 : x
  2. Step 2: Convert to fraction form
    42,749.76/64,137.60 = 20,556.84/x
  3. Step 3: Cross multiply
    42,749.76x = 64,137.60 × 20,556.84
  4. Step 4: Simplify right side
    42,749.76x = 1,318,466,381.18
  5. Step 5: Solve for x
    x = 1,318,466,381.18/42,749.76
  6. Step 6: Final answer
    x = 30,841.49

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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.