Home / 13,389.81-18,477.27-7,421.43

Finding the Fourth Proportional to 13,389.81, 18,477.27 and 7,421.43

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Solution

The fourth proportional to 13,389.81, 18,477.27 and 7,421.43 is: 10,241.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.81 : 18,477.27 = 7,421.43 : x
  2. Step 2: Convert to fraction form
    13,389.81/18,477.27 = 7,421.43/x
  3. Step 3: Cross multiply
    13,389.81x = 18,477.27 × 7,421.43
  4. Step 4: Simplify right side
    13,389.81x = 137,127,673.51
  5. Step 5: Solve for x
    x = 137,127,673.51/13,389.81
  6. Step 6: Final answer
    x = 10,241.20

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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.