Home / 40,887.20-61,330.80-12,809.60

Finding the Fourth Proportional to 40,887.20, 61,330.80 and 12,809.60

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Solution

The fourth proportional to 40,887.20, 61,330.80 and 12,809.60 is: 19,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,887.20 : 61,330.80 = 12,809.60 : x
  2. Step 2: Convert to fraction form
    40,887.20/61,330.80 = 12,809.60/x
  3. Step 3: Cross multiply
    40,887.20x = 61,330.80 × 12,809.60
  4. Step 4: Simplify right side
    40,887.20x = 785,623,015.68
  5. Step 5: Solve for x
    x = 785,623,015.68/40,887.20
  6. Step 6: Final answer
    x = 19,214.40

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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.