Home / 20,986,680.90-28,963,774.72-12,616,760.35

Finding the Fourth Proportional to 20,986,680.90, 28,963,774.72 and 12,616,760.35

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Solution

The fourth proportional to 20,986,680.90, 28,963,774.72 and 12,616,760.35 is: 17,412,424.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986,680.90 : 28,963,774.72 = 12,616,760.35 : x
  2. Step 2: Convert to fraction form
    20,986,680.90/28,963,774.72 = 12,616,760.35/x
  3. Step 3: Cross multiply
    20,986,680.90x = 28,963,774.72 × 12,616,760.35
  4. Step 4: Simplify right side
    20,986,680.90x = 365,429,004,473,628.31
  5. Step 5: Solve for x
    x = 365,429,004,473,628.31/20,986,680.90
  6. Step 6: Final answer
    x = 17,412,424.87

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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.