Home / 20,807.37-31,218.93-12,493.19

Finding the Fourth Proportional to 20,807.37, 31,218.93 and 12,493.19

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Solution

The fourth proportional to 20,807.37, 31,218.93 and 12,493.19 is: 18,744.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.37 : 31,218.93 = 12,493.19 : x
  2. Step 2: Convert to fraction form
    20,807.37/31,218.93 = 12,493.19/x
  3. Step 3: Cross multiply
    20,807.37x = 31,218.93 × 12,493.19
  4. Step 4: Simplify right side
    20,807.37x = 390,024,024.09
  5. Step 5: Solve for x
    x = 390,024,024.09/20,807.37
  6. Step 6: Final answer
    x = 18,744.51

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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.