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Finding the Fourth Proportional to 42,004.60, 62,985.02 and 19,812.01

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Solution

The fourth proportional to 42,004.60, 62,985.02 and 19,812.01 is: 29,707.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,004.60 : 62,985.02 = 19,812.01 : x
  2. Step 2: Convert to fraction form
    42,004.60/62,985.02 = 19,812.01/x
  3. Step 3: Cross multiply
    42,004.60x = 62,985.02 × 19,812.01
  4. Step 4: Simplify right side
    42,004.60x = 1,247,859,846.09
  5. Step 5: Solve for x
    x = 1,247,859,846.09/42,004.60
  6. Step 6: Final answer
    x = 29,707.70

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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.