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Finding the Fourth Proportional to 21,652.84, 29,880.18 and 12,220.60

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Solution

The fourth proportional to 21,652.84, 29,880.18 and 12,220.60 is: 16,864.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.84 : 29,880.18 = 12,220.60 : x
  2. Step 2: Convert to fraction form
    21,652.84/29,880.18 = 12,220.60/x
  3. Step 3: Cross multiply
    21,652.84x = 29,880.18 × 12,220.60
  4. Step 4: Simplify right side
    21,652.84x = 365,153,727.71
  5. Step 5: Solve for x
    x = 365,153,727.71/21,652.84
  6. Step 6: Final answer
    x = 16,864.01

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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.