Home / 18,939.04-28,409.88-5,790.40

Finding the Fourth Proportional to 18,939.04, 28,409.88 and 5,790.40

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Solution

The fourth proportional to 18,939.04, 28,409.88 and 5,790.40 is: 8,686.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.04 : 28,409.88 = 5,790.40 : x
  2. Step 2: Convert to fraction form
    18,939.04/28,409.88 = 5,790.40/x
  3. Step 3: Cross multiply
    18,939.04x = 28,409.88 × 5,790.40
  4. Step 4: Simplify right side
    18,939.04x = 164,504,569.15
  5. Step 5: Solve for x
    x = 164,504,569.15/18,939.04
  6. Step 6: Final answer
    x = 8,686.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.