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Finding the Fourth Proportional to 31,802.40, 47,703.60 and 19,992.60

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Solution

The fourth proportional to 31,802.40, 47,703.60 and 19,992.60 is: 29,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,802.40 : 47,703.60 = 19,992.60 : x
  2. Step 2: Convert to fraction form
    31,802.40/47,703.60 = 19,992.60/x
  3. Step 3: Cross multiply
    31,802.40x = 47,703.60 × 19,992.60
  4. Step 4: Simplify right side
    31,802.40x = 953,718,993.36
  5. Step 5: Solve for x
    x = 953,718,993.36/31,802.40
  6. Step 6: Final answer
    x = 29,988.90

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1.5x scale

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.