Home / 20,421,026.05-28,181,021.81-11,128,598.67

Finding the Fourth Proportional to 20,421,026.05, 28,181,021.81 and 11,128,598.67

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Solution

The fourth proportional to 20,421,026.05, 28,181,021.81 and 11,128,598.67 is: 15,357,469.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,026.05 : 28,181,021.81 = 11,128,598.67 : x
  2. Step 2: Convert to fraction form
    20,421,026.05/28,181,021.81 = 11,128,598.67/x
  3. Step 3: Cross multiply
    20,421,026.05x = 28,181,021.81 × 11,128,598.67
  4. Step 4: Simplify right side
    20,421,026.05x = 313,615,281,834,007
  5. Step 5: Solve for x
    x = 313,615,281,834,007/20,421,026.05
  6. Step 6: Final answer
    x = 15,357,469.36

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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.