Home / 21,209,518.78-31,828,228.49-11,631,623.36

Finding the Fourth Proportional to 21,209,518.78, 31,828,228.49 and 11,631,623.36

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Solution

The fourth proportional to 21,209,518.78, 31,828,228.49 and 11,631,623.36 is: 17,455,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209,518.78 : 31,828,228.49 = 11,631,623.36 : x
  2. Step 2: Convert to fraction form
    21,209,518.78/31,828,228.49 = 11,631,623.36/x
  3. Step 3: Cross multiply
    21,209,518.78x = 31,828,228.49 × 11,631,623.36
  4. Step 4: Simplify right side
    21,209,518.78x = 370,213,965,881,639.44
  5. Step 5: Solve for x
    x = 370,213,965,881,639.44/21,209,518.78
  6. Step 6: Final answer
    x = 17,455,085.60

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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.