Home / 12,789,840.80-19,168,431.60-5,208,240.80

Finding the Fourth Proportional to 12,789,840.80, 19,168,431.60 and 5,208,240.80

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Solution

The fourth proportional to 12,789,840.80, 19,168,431.60 and 5,208,240.80 is: 7,805,711.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789,840.80 : 19,168,431.60 = 5,208,240.80 : x
  2. Step 2: Convert to fraction form
    12,789,840.80/19,168,431.60 = 5,208,240.80/x
  3. Step 3: Cross multiply
    12,789,840.80x = 19,168,431.60 × 5,208,240.80
  4. Step 4: Simplify right side
    12,789,840.80x = 99,833,807,531,129.28
  5. Step 5: Solve for x
    x = 99,833,807,531,129.28/12,789,840.80
  6. Step 6: Final answer
    x = 7,805,711.51

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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.