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Finding the Fourth Proportional to 12,155.52, 16,782.48 and 7,442.40

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Solution

The fourth proportional to 12,155.52, 16,782.48 and 7,442.40 is: 10,275.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.52 : 16,782.48 = 7,442.40 : x
  2. Step 2: Convert to fraction form
    12,155.52/16,782.48 = 7,442.40/x
  3. Step 3: Cross multiply
    12,155.52x = 16,782.48 × 7,442.40
  4. Step 4: Simplify right side
    12,155.52x = 124,901,929.15
  5. Step 5: Solve for x
    x = 124,901,929.15/12,155.52
  6. Step 6: Final answer
    x = 10,275.33

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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.