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Finding the Fourth Proportional to 15,551.40, 21,460.44 and 8,477.40

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Solution

The fourth proportional to 15,551.40, 21,460.44 and 8,477.40 is: 11,698.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,551.40 : 21,460.44 = 8,477.40 : x
  2. Step 2: Convert to fraction form
    15,551.40/21,460.44 = 8,477.40/x
  3. Step 3: Cross multiply
    15,551.40x = 21,460.44 × 8,477.40
  4. Step 4: Simplify right side
    15,551.40x = 181,928,734.06
  5. Step 5: Solve for x
    x = 181,928,734.06/15,551.40
  6. Step 6: Final answer
    x = 11,698.54

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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.