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Finding the Fourth Proportional to 15,551.16, 21,460.68 and 8,477.40

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Solution

The fourth proportional to 15,551.16, 21,460.68 and 8,477.40 is: 11,698.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,551.16 : 21,460.68 = 8,477.40 : x
  2. Step 2: Convert to fraction form
    15,551.16/21,460.68 = 8,477.40/x
  3. Step 3: Cross multiply
    15,551.16x = 21,460.68 × 8,477.40
  4. Step 4: Simplify right side
    15,551.16x = 181,930,768.63
  5. Step 5: Solve for x
    x = 181,930,768.63/15,551.16
  6. Step 6: Final answer
    x = 11,698.86

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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.