Home / 9,189.20-13,783.80-5,290.40

Finding the Fourth Proportional to 9,189.20, 13,783.80 and 5,290.40

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Solution

The fourth proportional to 9,189.20, 13,783.80 and 5,290.40 is: 7,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,189.20 : 13,783.80 = 5,290.40 : x
  2. Step 2: Convert to fraction form
    9,189.20/13,783.80 = 5,290.40/x
  3. Step 3: Cross multiply
    9,189.20x = 13,783.80 × 5,290.40
  4. Step 4: Simplify right side
    9,189.20x = 72,921,815.52
  5. Step 5: Solve for x
    x = 72,921,815.52/9,189.20
  6. Step 6: Final answer
    x = 7,935.60

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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.