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Finding the Fourth Proportional to 15,804.15, 21,810.36 and 9,089.78

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Solution

The fourth proportional to 15,804.15, 21,810.36 and 9,089.78 is: 12,544.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,804.15 : 21,810.36 = 9,089.78 : x
  2. Step 2: Convert to fraction form
    15,804.15/21,810.36 = 9,089.78/x
  3. Step 3: Cross multiply
    15,804.15x = 21,810.36 × 9,089.78
  4. Step 4: Simplify right side
    15,804.15x = 198,251,265.07
  5. Step 5: Solve for x
    x = 198,251,265.07/15,804.15
  6. Step 6: Final answer
    x = 12,544.25

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1.5x scale

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.