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Finding the Fourth Proportional to 14,664.78, 21,980.64 and 7,274.55

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Solution

The fourth proportional to 14,664.78, 21,980.64 and 7,274.55 is: 10,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,664.78 : 21,980.64 = 7,274.55 : x
  2. Step 2: Convert to fraction form
    14,664.78/21,980.64 = 7,274.55/x
  3. Step 3: Cross multiply
    14,664.78x = 21,980.64 × 7,274.55
  4. Step 4: Simplify right side
    14,664.78x = 159,899,264.71
  5. Step 5: Solve for x
    x = 159,899,264.71/14,664.78
  6. Step 6: Final answer
    x = 10,903.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.