Home / 20,172.90-30,235.05-10,307.10

Finding the Fourth Proportional to 20,172.90, 30,235.05 and 10,307.10

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Solution

The fourth proportional to 20,172.90, 30,235.05 and 10,307.10 is: 15,448.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.90 : 30,235.05 = 10,307.10 : x
  2. Step 2: Convert to fraction form
    20,172.90/30,235.05 = 10,307.10/x
  3. Step 3: Cross multiply
    20,172.90x = 30,235.05 × 10,307.10
  4. Step 4: Simplify right side
    20,172.90x = 311,635,683.86
  5. Step 5: Solve for x
    x = 311,635,683.86/20,172.90
  6. Step 6: Final answer
    x = 15,448.23

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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.