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Finding the Fourth Proportional to 15,765,509.19, 21,756,372.44 and 8,795,772.03

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Solution

The fourth proportional to 15,765,509.19, 21,756,372.44 and 8,795,772.03 is: 12,138,148.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,765,509.19 : 21,756,372.44 = 8,795,772.03 : x
  2. Step 2: Convert to fraction form
    15,765,509.19/21,756,372.44 = 8,795,772.03/x
  3. Step 3: Cross multiply
    15,765,509.19x = 21,756,372.44 × 8,795,772.03
  4. Step 4: Simplify right side
    15,765,509.19x = 191,364,092,182,014.84
  5. Step 5: Solve for x
    x = 191,364,092,182,014.84/15,765,509.19
  6. Step 6: Final answer
    x = 12,138,148.53

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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.