Home / 42,775.09-64,163.76-20,280.49

Finding the Fourth Proportional to 42,775.09, 64,163.76 and 20,280.49

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Solution

The fourth proportional to 42,775.09, 64,163.76 and 20,280.49 is: 30,421.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,775.09 : 64,163.76 = 20,280.49 : x
  2. Step 2: Convert to fraction form
    42,775.09/64,163.76 = 20,280.49/x
  3. Step 3: Cross multiply
    42,775.09x = 64,163.76 × 20,280.49
  4. Step 4: Simplify right side
    42,775.09x = 1,301,272,493.04
  5. Step 5: Solve for x
    x = 1,301,272,493.04/42,775.09
  6. Step 6: Final answer
    x = 30,421.27

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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.