Home / 21,011.08-28,986.10-15,040.57

Finding the Fourth Proportional to 21,011.08, 28,986.10 and 15,040.57

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Solution

The fourth proportional to 21,011.08, 28,986.10 and 15,040.57 is: 20,749.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.08 : 28,986.10 = 15,040.57 : x
  2. Step 2: Convert to fraction form
    21,011.08/28,986.10 = 15,040.57/x
  3. Step 3: Cross multiply
    21,011.08x = 28,986.10 × 15,040.57
  4. Step 4: Simplify right side
    21,011.08x = 435,967,466.08
  5. Step 5: Solve for x
    x = 435,967,466.08/21,011.08
  6. Step 6: Final answer
    x = 20,749.41

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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.