Home / 13,389.22-18,476.64-7,421.44

Finding the Fourth Proportional to 13,389.22, 18,476.64 and 7,421.44

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Solution

The fourth proportional to 13,389.22, 18,476.64 and 7,421.44 is: 10,241.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.22 : 18,476.64 = 7,421.44 : x
  2. Step 2: Convert to fraction form
    13,389.22/18,476.64 = 7,421.44/x
  3. Step 3: Cross multiply
    13,389.22x = 18,476.64 × 7,421.44
  4. Step 4: Simplify right side
    13,389.22x = 137,123,275.16
  5. Step 5: Solve for x
    x = 137,123,275.16/13,389.22
  6. Step 6: Final answer
    x = 10,241.32

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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.