Home / 20,701.20-31,051.80-20,154.45

Finding the Fourth Proportional to 20,701.20, 31,051.80 and 20,154.45

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Solution

The fourth proportional to 20,701.20, 31,051.80 and 20,154.45 is: 30,231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.20 : 31,051.80 = 20,154.45 : x
  2. Step 2: Convert to fraction form
    20,701.20/31,051.80 = 20,154.45/x
  3. Step 3: Cross multiply
    20,701.20x = 31,051.80 × 20,154.45
  4. Step 4: Simplify right side
    20,701.20x = 625,831,950.51
  5. Step 5: Solve for x
    x = 625,831,950.51/20,701.20
  6. Step 6: Final answer
    x = 30,231.68

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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.