Home / 13,746.99-18,972.20-9,921.79

Finding the Fourth Proportional to 13,746.99, 18,972.20 and 9,921.79

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Solution

The fourth proportional to 13,746.99, 18,972.20 and 9,921.79 is: 13,693.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,746.99 : 18,972.20 = 9,921.79 : x
  2. Step 2: Convert to fraction form
    13,746.99/18,972.20 = 9,921.79/x
  3. Step 3: Cross multiply
    13,746.99x = 18,972.20 × 9,921.79
  4. Step 4: Simplify right side
    13,746.99x = 188,238,184.24
  5. Step 5: Solve for x
    x = 188,238,184.24/13,746.99
  6. Step 6: Final answer
    x = 13,693.05

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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.