Home / 28,438.79-42,570.70-18,556.79

Finding the Fourth Proportional to 28,438.79, 42,570.70 and 18,556.79

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Solution

The fourth proportional to 28,438.79, 42,570.70 and 18,556.79 is: 27,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.79 : 42,570.70 = 18,556.79 : x
  2. Step 2: Convert to fraction form
    28,438.79/42,570.70 = 18,556.79/x
  3. Step 3: Cross multiply
    28,438.79x = 42,570.70 × 18,556.79
  4. Step 4: Simplify right side
    28,438.79x = 789,975,280.81
  5. Step 5: Solve for x
    x = 789,975,280.81/28,438.79
  6. Step 6: Final answer
    x = 27,778.10

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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.