Home / 20,430.08-28,193.46-11,938.04

Finding the Fourth Proportional to 20,430.08, 28,193.46 and 11,938.04

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Solution

The fourth proportional to 20,430.08, 28,193.46 and 11,938.04 is: 16,474.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.08 : 28,193.46 = 11,938.04 : x
  2. Step 2: Convert to fraction form
    20,430.08/28,193.46 = 11,938.04/x
  3. Step 3: Cross multiply
    20,430.08x = 28,193.46 × 11,938.04
  4. Step 4: Simplify right side
    20,430.08x = 336,574,653.22
  5. Step 5: Solve for x
    x = 336,574,653.22/20,430.08
  6. Step 6: Final answer
    x = 16,474.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.