Home / 20,742.05-31,113.01-5,159.67

Finding the Fourth Proportional to 20,742.05, 31,113.01 and 5,159.67

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Solution

The fourth proportional to 20,742.05, 31,113.01 and 5,159.67 is: 7,739.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.05 : 31,113.01 = 5,159.67 : x
  2. Step 2: Convert to fraction form
    20,742.05/31,113.01 = 5,159.67/x
  3. Step 3: Cross multiply
    20,742.05x = 31,113.01 × 5,159.67
  4. Step 4: Simplify right side
    20,742.05x = 160,532,838.51
  5. Step 5: Solve for x
    x = 160,532,838.51/20,742.05
  6. Step 6: Final answer
    x = 7,739.49

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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.