Home / 20,421,363.36-28,180,660.95-11,128,736.10

Finding the Fourth Proportional to 20,421,363.36, 28,180,660.95 and 11,128,736.10

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Solution

The fourth proportional to 20,421,363.36, 28,180,660.95 and 11,128,736.10 is: 15,357,208.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,363.36 : 28,180,660.95 = 11,128,736.10 : x
  2. Step 2: Convert to fraction form
    20,421,363.36/28,180,660.95 = 11,128,736.10/x
  3. Step 3: Cross multiply
    20,421,363.36x = 28,180,660.95 × 11,128,736.10
  4. Step 4: Simplify right side
    20,421,363.36x = 313,615,138,836,125.25
  5. Step 5: Solve for x
    x = 313,615,138,836,125.25/20,421,363.36
  6. Step 6: Final answer
    x = 15,357,208.69

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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.