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Finding the Fourth Proportional to 15,522.60, 21,420.54 and 8,448.60

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Solution

The fourth proportional to 15,522.60, 21,420.54 and 8,448.60 is: 11,658.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.60 : 21,420.54 = 8,448.60 : x
  2. Step 2: Convert to fraction form
    15,522.60/21,420.54 = 8,448.60/x
  3. Step 3: Cross multiply
    15,522.60x = 21,420.54 × 8,448.60
  4. Step 4: Simplify right side
    15,522.60x = 180,973,574.24
  5. Step 5: Solve for x
    x = 180,973,574.24/15,522.60
  6. Step 6: Final answer
    x = 11,658.72

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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.