Home / 21,007.86-28,990.59-11,448.18

Finding the Fourth Proportional to 21,007.86, 28,990.59 and 11,448.18

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Solution

The fourth proportional to 21,007.86, 28,990.59 and 11,448.18 is: 15,798.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.86 : 28,990.59 = 11,448.18 : x
  2. Step 2: Convert to fraction form
    21,007.86/28,990.59 = 11,448.18/x
  3. Step 3: Cross multiply
    21,007.86x = 28,990.59 × 11,448.18
  4. Step 4: Simplify right side
    21,007.86x = 331,889,492.63
  5. Step 5: Solve for x
    x = 331,889,492.63/21,007.86
  6. Step 6: Final answer
    x = 15,798.35

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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.