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Finding the Fourth Proportional to 9,938.60, 14,907.90 and 7,314.20

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Solution

The fourth proportional to 9,938.60, 14,907.90 and 7,314.20 is: 10,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,938.60 : 14,907.90 = 7,314.20 : x
  2. Step 2: Convert to fraction form
    9,938.60/14,907.90 = 7,314.20/x
  3. Step 3: Cross multiply
    9,938.60x = 14,907.90 × 7,314.20
  4. Step 4: Simplify right side
    9,938.60x = 109,039,362.18
  5. Step 5: Solve for x
    x = 109,039,362.18/9,938.60
  6. Step 6: Final answer
    x = 10,971.30

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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.