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Finding the Fourth Proportional to 42,903.76, 64,354.71 and 11,739.01

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Solution

The fourth proportional to 42,903.76, 64,354.71 and 11,739.01 is: 17,608.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,903.76 : 64,354.71 = 11,739.01 : x
  2. Step 2: Convert to fraction form
    42,903.76/64,354.71 = 11,739.01/x
  3. Step 3: Cross multiply
    42,903.76x = 64,354.71 × 11,739.01
  4. Step 4: Simplify right side
    42,903.76x = 755,460,584.24
  5. Step 5: Solve for x
    x = 755,460,584.24/42,903.76
  6. Step 6: Final answer
    x = 17,608.26

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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.