Home / 21,008.18-28,990.92-11,448.15

Finding the Fourth Proportional to 21,008.18, 28,990.92 and 11,448.15

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Solution

The fourth proportional to 21,008.18, 28,990.92 and 11,448.15 is: 15,798.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.18 : 28,990.92 = 11,448.15 : x
  2. Step 2: Convert to fraction form
    21,008.18/28,990.92 = 11,448.15/x
  3. Step 3: Cross multiply
    21,008.18x = 28,990.92 × 11,448.15
  4. Step 4: Simplify right side
    21,008.18x = 331,892,509.51
  5. Step 5: Solve for x
    x = 331,892,509.51/21,008.18
  6. Step 6: Final answer
    x = 15,798.25

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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.