Home / 30,420.48-41,980.96-16,991.68

Finding the Fourth Proportional to 30,420.48, 41,980.96 and 16,991.68

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Solution

The fourth proportional to 30,420.48, 41,980.96 and 16,991.68 is: 23,448.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.48 : 41,980.96 = 16,991.68 : x
  2. Step 2: Convert to fraction form
    30,420.48/41,980.96 = 16,991.68/x
  3. Step 3: Cross multiply
    30,420.48x = 41,980.96 × 16,991.68
  4. Step 4: Simplify right side
    30,420.48x = 713,327,038.41
  5. Step 5: Solve for x
    x = 713,327,038.41/30,420.48
  6. Step 6: Final answer
    x = 23,448.91

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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.