Home / 20,893.08-31,329.54-12,130.20

Finding the Fourth Proportional to 20,893.08, 31,329.54 and 12,130.20

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Solution

The fourth proportional to 20,893.08, 31,329.54 and 12,130.20 is: 18,189.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.08 : 31,329.54 = 12,130.20 : x
  2. Step 2: Convert to fraction form
    20,893.08/31,329.54 = 12,130.20/x
  3. Step 3: Cross multiply
    20,893.08x = 31,329.54 × 12,130.20
  4. Step 4: Simplify right side
    20,893.08x = 380,033,586.11
  5. Step 5: Solve for x
    x = 380,033,586.11/20,893.08
  6. Step 6: Final answer
    x = 18,189.45

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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.