Home / 30,969.09-42,713.80-21,424.86

Finding the Fourth Proportional to 30,969.09, 42,713.80 and 21,424.86

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Solution

The fourth proportional to 30,969.09, 42,713.80 and 21,424.86 is: 29,550.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.09 : 42,713.80 = 21,424.86 : x
  2. Step 2: Convert to fraction form
    30,969.09/42,713.80 = 21,424.86/x
  3. Step 3: Cross multiply
    30,969.09x = 42,713.80 × 21,424.86
  4. Step 4: Simplify right side
    30,969.09x = 915,137,131.51
  5. Step 5: Solve for x
    x = 915,137,131.51/30,969.09
  6. Step 6: Final answer
    x = 29,550.02

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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.