Home / 18,421.62-25,420.71-10,870.31

Finding the Fourth Proportional to 18,421.62, 25,420.71 and 10,870.31

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Solution

The fourth proportional to 18,421.62, 25,420.71 and 10,870.31 is: 15,000.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.62 : 25,420.71 = 10,870.31 : x
  2. Step 2: Convert to fraction form
    18,421.62/25,420.71 = 10,870.31/x
  3. Step 3: Cross multiply
    18,421.62x = 25,420.71 × 10,870.31
  4. Step 4: Simplify right side
    18,421.62x = 276,331,102.44
  5. Step 5: Solve for x
    x = 276,331,102.44/18,421.62
  6. Step 6: Final answer
    x = 15,000.37

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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.