Home / 13,389.64-18,477.79-7,421.24

Finding the Fourth Proportional to 13,389.64, 18,477.79 and 7,421.24

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Solution

The fourth proportional to 13,389.64, 18,477.79 and 7,421.24 is: 10,241.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.64 : 18,477.79 = 7,421.24 : x
  2. Step 2: Convert to fraction form
    13,389.64/18,477.79 = 7,421.24/x
  3. Step 3: Cross multiply
    13,389.64x = 18,477.79 × 7,421.24
  4. Step 4: Simplify right side
    13,389.64x = 137,128,141.90
  5. Step 5: Solve for x
    x = 137,128,141.90/13,389.64
  6. Step 6: Final answer
    x = 10,241.36

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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.