Home / 13,389.65-18,476.83-7,421.87

Finding the Fourth Proportional to 13,389.65, 18,476.83 and 7,421.87

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Solution

The fourth proportional to 13,389.65, 18,476.83 and 7,421.87 is: 10,241.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.65 : 18,476.83 = 7,421.87 : x
  2. Step 2: Convert to fraction form
    13,389.65/18,476.83 = 7,421.87/x
  3. Step 3: Cross multiply
    13,389.65x = 18,476.83 × 7,421.87
  4. Step 4: Simplify right side
    13,389.65x = 137,132,630.27
  5. Step 5: Solve for x
    x = 137,132,630.27/13,389.65
  6. Step 6: Final answer
    x = 10,241.69

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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.