Home / 18,487.08-27,729.81-5,160.15

Finding the Fourth Proportional to 18,487.08, 27,729.81 and 5,160.15

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Solution

The fourth proportional to 18,487.08, 27,729.81 and 5,160.15 is: 7,740.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.08 : 27,729.81 = 5,160.15 : x
  2. Step 2: Convert to fraction form
    18,487.08/27,729.81 = 5,160.15/x
  3. Step 3: Cross multiply
    18,487.08x = 27,729.81 × 5,160.15
  4. Step 4: Simplify right side
    18,487.08x = 143,089,979.07
  5. Step 5: Solve for x
    x = 143,089,979.07/18,487.08
  6. Step 6: Final answer
    x = 7,740.00

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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.