Home / 30,153.12-45,172.58-20,127.63

Finding the Fourth Proportional to 30,153.12, 45,172.58 and 20,127.63

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Solution

The fourth proportional to 30,153.12, 45,172.58 and 20,127.63 is: 30,153.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,153.12 : 45,172.58 = 20,127.63 : x
  2. Step 2: Convert to fraction form
    30,153.12/45,172.58 = 20,127.63/x
  3. Step 3: Cross multiply
    30,153.12x = 45,172.58 × 20,127.63
  4. Step 4: Simplify right side
    30,153.12x = 909,216,976.39
  5. Step 5: Solve for x
    x = 909,216,976.39/30,153.12
  6. Step 6: Final answer
    x = 30,153.33

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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.