Home / 18,390.90-25,378.71-10,007.42

Finding the Fourth Proportional to 18,390.90, 25,378.71 and 10,007.42

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Solution

The fourth proportional to 18,390.90, 25,378.71 and 10,007.42 is: 13,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.90 : 25,378.71 = 10,007.42 : x
  2. Step 2: Convert to fraction form
    18,390.90/25,378.71 = 10,007.42/x
  3. Step 3: Cross multiply
    18,390.90x = 25,378.71 × 10,007.42
  4. Step 4: Simplify right side
    18,390.90x = 253,975,410.03
  5. Step 5: Solve for x
    x = 253,975,410.03/18,390.90
  6. Step 6: Final answer
    x = 13,809.84

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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.