Home / 13,709.54-18,919.23-7,421.92

Finding the Fourth Proportional to 13,709.54, 18,919.23 and 7,421.92

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Solution

The fourth proportional to 13,709.54, 18,919.23 and 7,421.92 is: 10,242.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.54 : 18,919.23 = 7,421.92 : x
  2. Step 2: Convert to fraction form
    13,709.54/18,919.23 = 7,421.92/x
  3. Step 3: Cross multiply
    13,709.54x = 18,919.23 × 7,421.92
  4. Step 4: Simplify right side
    13,709.54x = 140,417,011.52
  5. Step 5: Solve for x
    x = 140,417,011.52/13,709.54
  6. Step 6: Final answer
    x = 10,242.28

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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.