Home / 20,732,378-28,621,039.56-12,894,416.78

Finding the Fourth Proportional to 20,732,378, 28,621,039.56 and 12,894,416.78

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Solution

The fourth proportional to 20,732,378, 28,621,039.56 and 12,894,416.78 is: 17,800,737.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732,378 : 28,621,039.56 = 12,894,416.78 : x
  2. Step 2: Convert to fraction form
    20,732,378/28,621,039.56 = 12,894,416.78/x
  3. Step 3: Cross multiply
    20,732,378x = 28,621,039.56 × 12,894,416.78
  4. Step 4: Simplify right side
    20,732,378x = 369,051,612,763,507.75
  5. Step 5: Solve for x
    x = 369,051,612,763,507.75/20,732,378
  6. Step 6: Final answer
    x = 17,800,737.22

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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.