Home / 42,783.92-64,119.84-20,553.06

Finding the Fourth Proportional to 42,783.92, 64,119.84 and 20,553.06

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Solution

The fourth proportional to 42,783.92, 64,119.84 and 20,553.06 is: 30,802.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,783.92 : 64,119.84 = 20,553.06 : x
  2. Step 2: Convert to fraction form
    42,783.92/64,119.84 = 20,553.06/x
  3. Step 3: Cross multiply
    42,783.92x = 64,119.84 × 20,553.06
  4. Step 4: Simplify right side
    42,783.92x = 1,317,859,082.09
  5. Step 5: Solve for x
    x = 1,317,859,082.09/42,783.92
  6. Step 6: Final answer
    x = 30,802.67

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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.