Home / 13,218.23-18,242.69-7,913.05

Finding the Fourth Proportional to 13,218.23, 18,242.69 and 7,913.05

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Solution

The fourth proportional to 13,218.23, 18,242.69 and 7,913.05 is: 10,920.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.23 : 18,242.69 = 7,913.05 : x
  2. Step 2: Convert to fraction form
    13,218.23/18,242.69 = 7,913.05/x
  3. Step 3: Cross multiply
    13,218.23x = 18,242.69 × 7,913.05
  4. Step 4: Simplify right side
    13,218.23x = 144,355,232.93
  5. Step 5: Solve for x
    x = 144,355,232.93/13,218.23
  6. Step 6: Final answer
    x = 10,920.92

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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.