Home / 28,290.57-39,040.83-15,369.74

Finding the Fourth Proportional to 28,290.57, 39,040.83 and 15,369.74

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Solution

The fourth proportional to 28,290.57, 39,040.83 and 15,369.74 is: 21,210.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.57 : 39,040.83 = 15,369.74 : x
  2. Step 2: Convert to fraction form
    28,290.57/39,040.83 = 15,369.74/x
  3. Step 3: Cross multiply
    28,290.57x = 39,040.83 × 15,369.74
  4. Step 4: Simplify right side
    28,290.57x = 600,047,406.48
  5. Step 5: Solve for x
    x = 600,047,406.48/28,290.57
  6. Step 6: Final answer
    x = 21,210.16

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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.