Home / 57,868.47-86,809.65-20,420.81

Finding the Fourth Proportional to 57,868.47, 86,809.65 and 20,420.81

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Solution

The fourth proportional to 57,868.47, 86,809.65 and 20,420.81 is: 30,633.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,868.47 : 86,809.65 = 20,420.81 : x
  2. Step 2: Convert to fraction form
    57,868.47/86,809.65 = 20,420.81/x
  3. Step 3: Cross multiply
    57,868.47x = 86,809.65 × 20,420.81
  4. Step 4: Simplify right side
    57,868.47x = 1,772,723,368.82
  5. Step 5: Solve for x
    x = 1,772,723,368.82/57,868.47
  6. Step 6: Final answer
    x = 30,633.67

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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.