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Finding the Fourth Proportional to 14,420.40, 21,630.06 and 7,400.40

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Solution

The fourth proportional to 14,420.40, 21,630.06 and 7,400.40 is: 11,100.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420.40 : 21,630.06 = 7,400.40 : x
  2. Step 2: Convert to fraction form
    14,420.40/21,630.06 = 7,400.40/x
  3. Step 3: Cross multiply
    14,420.40x = 21,630.06 × 7,400.40
  4. Step 4: Simplify right side
    14,420.40x = 160,071,096.02
  5. Step 5: Solve for x
    x = 160,071,096.02/14,420.40
  6. Step 6: Final answer
    x = 11,100.32

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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.