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Finding the Fourth Proportional to 35,643.55, 53,458.03 and 12,271.81

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Solution

The fourth proportional to 35,643.55, 53,458.03 and 12,271.81 is: 18,405.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,643.55 : 53,458.03 = 12,271.81 : x
  2. Step 2: Convert to fraction form
    35,643.55/53,458.03 = 12,271.81/x
  3. Step 3: Cross multiply
    35,643.55x = 53,458.03 × 12,271.81
  4. Step 4: Simplify right side
    35,643.55x = 656,026,787.13
  5. Step 5: Solve for x
    x = 656,026,787.13/35,643.55
  6. Step 6: Final answer
    x = 18,405.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.