Home / 13,709.62-18,919.30-7,421.98

Finding the Fourth Proportional to 13,709.62, 18,919.30 and 7,421.98

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Solution

The fourth proportional to 13,709.62, 18,919.30 and 7,421.98 is: 10,242.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.62 : 18,919.30 = 7,421.98 : x
  2. Step 2: Convert to fraction form
    13,709.62/18,919.30 = 7,421.98/x
  3. Step 3: Cross multiply
    13,709.62x = 18,919.30 × 7,421.98
  4. Step 4: Simplify right side
    13,709.62x = 140,418,666.21
  5. Step 5: Solve for x
    x = 140,418,666.21/13,709.62
  6. Step 6: Final answer
    x = 10,242.35

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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.