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Finding the Fourth Proportional to 14,226.16, 19,630.20 and 7,938.40

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Solution

The fourth proportional to 14,226.16, 19,630.20 and 7,938.40 is: 10,953.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,226.16 : 19,630.20 = 7,938.40 : x
  2. Step 2: Convert to fraction form
    14,226.16/19,630.20 = 7,938.40/x
  3. Step 3: Cross multiply
    14,226.16x = 19,630.20 × 7,938.40
  4. Step 4: Simplify right side
    14,226.16x = 155,832,379.68
  5. Step 5: Solve for x
    x = 155,832,379.68/14,226.16
  6. Step 6: Final answer
    x = 10,953.93

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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.