Home / 15,516.36-21,412.55-8,442.63

Finding the Fourth Proportional to 15,516.36, 21,412.55 and 8,442.63

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Solution

The fourth proportional to 15,516.36, 21,412.55 and 8,442.63 is: 11,650.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.36 : 21,412.55 = 8,442.63 : x
  2. Step 2: Convert to fraction form
    15,516.36/21,412.55 = 8,442.63/x
  3. Step 3: Cross multiply
    15,516.36x = 21,412.55 × 8,442.63
  4. Step 4: Simplify right side
    15,516.36x = 180,778,258.11
  5. Step 5: Solve for x
    x = 180,778,258.11/15,516.36
  6. Step 6: Final answer
    x = 11,650.82

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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.