Home / 21,769.07-30,047.54-12,821.74

Finding the Fourth Proportional to 21,769.07, 30,047.54 and 12,821.74

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Solution

The fourth proportional to 21,769.07, 30,047.54 and 12,821.74 is: 17,697.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,769.07 : 30,047.54 = 12,821.74 : x
  2. Step 2: Convert to fraction form
    21,769.07/30,047.54 = 12,821.74/x
  3. Step 3: Cross multiply
    21,769.07x = 30,047.54 × 12,821.74
  4. Step 4: Simplify right side
    21,769.07x = 385,261,606.29
  5. Step 5: Solve for x
    x = 385,261,606.29/21,769.07
  6. Step 6: Final answer
    x = 17,697.66

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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.