Home / 20,112,128.87-30,031,421.09-18,975,509.33

Finding the Fourth Proportional to 20,112,128.87, 30,031,421.09 and 18,975,509.33

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Solution

The fourth proportional to 20,112,128.87, 30,031,421.09 and 18,975,509.33 is: 28,334,221.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112,128.87 : 30,031,421.09 = 18,975,509.33 : x
  2. Step 2: Convert to fraction form
    20,112,128.87/30,031,421.09 = 18,975,509.33/x
  3. Step 3: Cross multiply
    20,112,128.87x = 30,031,421.09 × 18,975,509.33
  4. Step 4: Simplify right side
    20,112,128.87x = 569,861,510,841,419.12
  5. Step 5: Solve for x
    x = 569,861,510,841,419.12/20,112,128.87
  6. Step 6: Final answer
    x = 28,334,221.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.