Home / 21,130.89-29,160.38-11,570.67

Finding the Fourth Proportional to 21,130.89, 29,160.38 and 11,570.67

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Solution

The fourth proportional to 21,130.89, 29,160.38 and 11,570.67 is: 15,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.89 : 29,160.38 = 11,570.67 : x
  2. Step 2: Convert to fraction form
    21,130.89/29,160.38 = 11,570.67/x
  3. Step 3: Cross multiply
    21,130.89x = 29,160.38 × 11,570.67
  4. Step 4: Simplify right side
    21,130.89x = 337,405,076.20
  5. Step 5: Solve for x
    x = 337,405,076.20/21,130.89
  6. Step 6: Final answer
    x = 15,967.39

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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.