Home / 20,313,915.68-30,479,421.08-12,643,975.46

Finding the Fourth Proportional to 20,313,915.68, 30,479,421.08 and 12,643,975.46

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Solution

The fourth proportional to 20,313,915.68, 30,479,421.08 and 12,643,975.46 is: 18,971,283.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,313,915.68 : 30,479,421.08 = 12,643,975.46 : x
  2. Step 2: Convert to fraction form
    20,313,915.68/30,479,421.08 = 12,643,975.46/x
  3. Step 3: Cross multiply
    20,313,915.68x = 30,479,421.08 × 12,643,975.46
  4. Step 4: Simplify right side
    20,313,915.68x = 385,381,051,954,909.69
  5. Step 5: Solve for x
    x = 385,381,051,954,909.69/20,313,915.68
  6. Step 6: Final answer
    x = 18,971,283.44

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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.