Home / 13,399.16-18,489.54-7,430.70

Finding the Fourth Proportional to 13,399.16, 18,489.54 and 7,430.70

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Solution

The fourth proportional to 13,399.16, 18,489.54 and 7,430.70 is: 10,253.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.16 : 18,489.54 = 7,430.70 : x
  2. Step 2: Convert to fraction form
    13,399.16/18,489.54 = 7,430.70/x
  3. Step 3: Cross multiply
    13,399.16x = 18,489.54 × 7,430.70
  4. Step 4: Simplify right side
    13,399.16x = 137,390,224.88
  5. Step 5: Solve for x
    x = 137,390,224.88/13,399.16
  6. Step 6: Final answer
    x = 10,253.64

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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.