Home / 20,420,214.80-28,179,531.48-11,127,865.60

Finding the Fourth Proportional to 20,420,214.80, 28,179,531.48 and 11,127,865.60

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Solution

The fourth proportional to 20,420,214.80, 28,179,531.48 and 11,127,865.60 is: 15,356,255.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420,214.80 : 28,179,531.48 = 11,127,865.60 : x
  2. Step 2: Convert to fraction form
    20,420,214.80/28,179,531.48 = 11,127,865.60/x
  3. Step 3: Cross multiply
    20,420,214.80x = 28,179,531.48 × 11,127,865.60
  4. Step 4: Simplify right side
    20,420,214.80x = 313,578,038,980,409.06
  5. Step 5: Solve for x
    x = 313,578,038,980,409.06/20,420,214.80
  6. Step 6: Final answer
    x = 15,356,255.65

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1.5x scale

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.