Home / 15,328.78-21,155.60-8,614.69

Finding the Fourth Proportional to 15,328.78, 21,155.60 and 8,614.69

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Solution

The fourth proportional to 15,328.78, 21,155.60 and 8,614.69 is: 11,889.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.78 : 21,155.60 = 8,614.69 : x
  2. Step 2: Convert to fraction form
    15,328.78/21,155.60 = 8,614.69/x
  3. Step 3: Cross multiply
    15,328.78x = 21,155.60 × 8,614.69
  4. Step 4: Simplify right side
    15,328.78x = 182,248,935.76
  5. Step 5: Solve for x
    x = 182,248,935.76/15,328.78
  6. Step 6: Final answer
    x = 11,889.33

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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.