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Finding the Fourth Proportional to 14,638.78, 21,980.04 and 14,420.08

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Solution

The fourth proportional to 14,638.78, 21,980.04 and 14,420.08 is: 21,651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,638.78 : 21,980.04 = 14,420.08 : x
  2. Step 2: Convert to fraction form
    14,638.78/21,980.04 = 14,420.08/x
  3. Step 3: Cross multiply
    14,638.78x = 21,980.04 × 14,420.08
  4. Step 4: Simplify right side
    14,638.78x = 316,953,935.20
  5. Step 5: Solve for x
    x = 316,953,935.20/14,638.78
  6. Step 6: Final answer
    x = 21,651.66

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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.