Home / 20,109.47-30,165.74-5,318.00

Finding the Fourth Proportional to 20,109.47, 30,165.74 and 5,318.00

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Solution

The fourth proportional to 20,109.47, 30,165.74 and 5,318.00 is: 7,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.47 : 30,165.74 = 5,318.00 : x
  2. Step 2: Convert to fraction form
    20,109.47/30,165.74 = 5,318.00/x
  3. Step 3: Cross multiply
    20,109.47x = 30,165.74 × 5,318.00
  4. Step 4: Simplify right side
    20,109.47x = 160,421,321.06
  5. Step 5: Solve for x
    x = 160,421,321.06/20,109.47
  6. Step 6: Final answer
    x = 7,977.40

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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.