Home / 15,664,688.72-21,617,642.88-8,789,679.26

Finding the Fourth Proportional to 15,664,688.72, 21,617,642.88 and 8,789,679.26

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Solution

The fourth proportional to 15,664,688.72, 21,617,642.88 and 8,789,679.26 is: 12,129,966.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,664,688.72 : 21,617,642.88 = 8,789,679.26 : x
  2. Step 2: Convert to fraction form
    15,664,688.72/21,617,642.88 = 8,789,679.26/x
  3. Step 3: Cross multiply
    15,664,688.72x = 21,617,642.88 × 8,789,679.26
  4. Step 4: Simplify right side
    15,664,688.72x = 190,012,147,245,400.59
  5. Step 5: Solve for x
    x = 190,012,147,245,400.59/15,664,688.72
  6. Step 6: Final answer
    x = 12,129,966.36

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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.