Home / 13,389.45-18,477.87-7,421.52

Finding the Fourth Proportional to 13,389.45, 18,477.87 and 7,421.52

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Solution

The fourth proportional to 13,389.45, 18,477.87 and 7,421.52 is: 10,241.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.45 : 18,477.87 = 7,421.52 : x
  2. Step 2: Convert to fraction form
    13,389.45/18,477.87 = 7,421.52/x
  3. Step 3: Cross multiply
    13,389.45x = 18,477.87 × 7,421.52
  4. Step 4: Simplify right side
    13,389.45x = 137,133,964.97
  5. Step 5: Solve for x
    x = 137,133,964.97/13,389.45
  6. Step 6: Final answer
    x = 10,241.94

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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.