Home / 13,389.30-18,477.36-7,421.10

Finding the Fourth Proportional to 13,389.30, 18,477.36 and 7,421.10

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Solution

The fourth proportional to 13,389.30, 18,477.36 and 7,421.10 is: 10,241.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.30 : 18,477.36 = 7,421.10 : x
  2. Step 2: Convert to fraction form
    13,389.30/18,477.36 = 7,421.10/x
  3. Step 3: Cross multiply
    13,389.30x = 18,477.36 × 7,421.10
  4. Step 4: Simplify right side
    13,389.30x = 137,122,336.30
  5. Step 5: Solve for x
    x = 137,122,336.30/13,389.30
  6. Step 6: Final answer
    x = 10,241.19

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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.