Home / 13,686.68-18,887.62-7,399.05

Finding the Fourth Proportional to 13,686.68, 18,887.62 and 7,399.05

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Solution

The fourth proportional to 13,686.68, 18,887.62 and 7,399.05 is: 10,210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.68 : 18,887.62 = 7,399.05 : x
  2. Step 2: Convert to fraction form
    13,686.68/18,887.62 = 7,399.05/x
  3. Step 3: Cross multiply
    13,686.68x = 18,887.62 × 7,399.05
  4. Step 4: Simplify right side
    13,686.68x = 139,750,549.48
  5. Step 5: Solve for x
    x = 139,750,549.48/13,686.68
  6. Step 6: Final answer
    x = 10,210.70

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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.