Home / 13,709.72-18,919.40-7,422.08

Finding the Fourth Proportional to 13,709.72, 18,919.40 and 7,422.08

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Solution

The fourth proportional to 13,709.72, 18,919.40 and 7,422.08 is: 10,242.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.72 : 18,919.40 = 7,422.08 : x
  2. Step 2: Convert to fraction form
    13,709.72/18,919.40 = 7,422.08/x
  3. Step 3: Cross multiply
    13,709.72x = 18,919.40 × 7,422.08
  4. Step 4: Simplify right side
    13,709.72x = 140,421,300.35
  5. Step 5: Solve for x
    x = 140,421,300.35/13,709.72
  6. Step 6: Final answer
    x = 10,242.46

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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.