Home / 20,973.08-31,459.62-5,390.72

Finding the Fourth Proportional to 20,973.08, 31,459.62 and 5,390.72

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Solution

The fourth proportional to 20,973.08, 31,459.62 and 5,390.72 is: 8,086.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.08 : 31,459.62 = 5,390.72 : x
  2. Step 2: Convert to fraction form
    20,973.08/31,459.62 = 5,390.72/x
  3. Step 3: Cross multiply
    20,973.08x = 31,459.62 × 5,390.72
  4. Step 4: Simplify right side
    20,973.08x = 169,590,002.73
  5. Step 5: Solve for x
    x = 169,590,002.73/20,973.08
  6. Step 6: Final answer
    x = 8,086.08

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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.