Home / 20,904.79-31,357.05-5,109.93

Finding the Fourth Proportional to 20,904.79, 31,357.05 and 5,109.93

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Solution

The fourth proportional to 20,904.79, 31,357.05 and 5,109.93 is: 7,664.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.79 : 31,357.05 = 5,109.93 : x
  2. Step 2: Convert to fraction form
    20,904.79/31,357.05 = 5,109.93/x
  3. Step 3: Cross multiply
    20,904.79x = 31,357.05 × 5,109.93
  4. Step 4: Simplify right side
    20,904.79x = 160,232,330.51
  5. Step 5: Solve for x
    x = 160,232,330.51/20,904.79
  6. Step 6: Final answer
    x = 7,664.86

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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.