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Finding the Fourth Proportional to 21,624.64, 29,841.99 and 11,688.64

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Solution

The fourth proportional to 21,624.64, 29,841.99 and 11,688.64 is: 16,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,624.64 : 29,841.99 = 11,688.64 : x
  2. Step 2: Convert to fraction form
    21,624.64/29,841.99 = 11,688.64/x
  3. Step 3: Cross multiply
    21,624.64x = 29,841.99 × 11,688.64
  4. Step 4: Simplify right side
    21,624.64x = 348,812,277.99
  5. Step 5: Solve for x
    x = 348,812,277.99/21,624.64
  6. Step 6: Final answer
    x = 16,130.32

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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.