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Finding the Fourth Proportional to 18,821,343.40, 28,232,015.10 and 14,038,374.40

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Solution

The fourth proportional to 18,821,343.40, 28,232,015.10 and 14,038,374.40 is: 21,057,561.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821,343.40 : 28,232,015.10 = 14,038,374.40 : x
  2. Step 2: Convert to fraction form
    18,821,343.40/28,232,015.10 = 14,038,374.40/x
  3. Step 3: Cross multiply
    18,821,343.40x = 28,232,015.10 × 14,038,374.40
  4. Step 4: Simplify right side
    18,821,343.40x = 396,331,598,040,253.50
  5. Step 5: Solve for x
    x = 396,331,598,040,253.50/18,821,343.40
  6. Step 6: Final answer
    x = 21,057,561.60

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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.