Home / 11,925.40-16,455.78-6,620.08

Finding the Fourth Proportional to 11,925.40, 16,455.78 and 6,620.08

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Solution

The fourth proportional to 11,925.40, 16,455.78 and 6,620.08 is: 9,135.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,925.40 : 16,455.78 = 6,620.08 : x
  2. Step 2: Convert to fraction form
    11,925.40/16,455.78 = 6,620.08/x
  3. Step 3: Cross multiply
    11,925.40x = 16,455.78 × 6,620.08
  4. Step 4: Simplify right side
    11,925.40x = 108,938,580.06
  5. Step 5: Solve for x
    x = 108,938,580.06/11,925.40
  6. Step 6: Final answer
    x = 9,135.00

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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.