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Finding the Fourth Proportional to 15,365.70, 21,203.32 and 8,559.22

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Solution

The fourth proportional to 15,365.70, 21,203.32 and 8,559.22 is: 11,810.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,365.70 : 21,203.32 = 8,559.22 : x
  2. Step 2: Convert to fraction form
    15,365.70/21,203.32 = 8,559.22/x
  3. Step 3: Cross multiply
    15,365.70x = 21,203.32 × 8,559.22
  4. Step 4: Simplify right side
    15,365.70x = 181,483,880.61
  5. Step 5: Solve for x
    x = 181,483,880.61/15,365.70
  6. Step 6: Final answer
    x = 11,810.97

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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.