Home / 13,389.51-18,477.53-7,421.56

Finding the Fourth Proportional to 13,389.51, 18,477.53 and 7,421.56

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Solution

The fourth proportional to 13,389.51, 18,477.53 and 7,421.56 is: 10,241.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.51 : 18,477.53 = 7,421.56 : x
  2. Step 2: Convert to fraction form
    13,389.51/18,477.53 = 7,421.56/x
  3. Step 3: Cross multiply
    13,389.51x = 18,477.53 × 7,421.56
  4. Step 4: Simplify right side
    13,389.51x = 137,132,097.55
  5. Step 5: Solve for x
    x = 137,132,097.55/13,389.51
  6. Step 6: Final answer
    x = 10,241.76

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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.