Home / 30,739.73-42,420.40-17,312.31

Finding the Fourth Proportional to 30,739.73, 42,420.40 and 17,312.31

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Solution

The fourth proportional to 30,739.73, 42,420.40 and 17,312.31 is: 23,890.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,739.73 : 42,420.40 = 17,312.31 : x
  2. Step 2: Convert to fraction form
    30,739.73/42,420.40 = 17,312.31/x
  3. Step 3: Cross multiply
    30,739.73x = 42,420.40 × 17,312.31
  4. Step 4: Simplify right side
    30,739.73x = 734,395,071.84
  5. Step 5: Solve for x
    x = 734,395,071.84/30,739.73
  6. Step 6: Final answer
    x = 23,890.75

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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.