Home / 15,389.62-21,239.36-8,930.68

Finding the Fourth Proportional to 15,389.62, 21,239.36 and 8,930.68

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Solution

The fourth proportional to 15,389.62, 21,239.36 and 8,930.68 is: 12,325.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.62 : 21,239.36 = 8,930.68 : x
  2. Step 2: Convert to fraction form
    15,389.62/21,239.36 = 8,930.68/x
  3. Step 3: Cross multiply
    15,389.62x = 21,239.36 × 8,930.68
  4. Step 4: Simplify right side
    15,389.62x = 189,681,973.27
  5. Step 5: Solve for x
    x = 189,681,973.27/15,389.62
  6. Step 6: Final answer
    x = 12,325.32

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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.