Home / 15,389.00-21,236.81-8,315.42

Finding the Fourth Proportional to 15,389.00, 21,236.81 and 8,315.42

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Solution

The fourth proportional to 15,389.00, 21,236.81 and 8,315.42 is: 11,475.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.00 : 21,236.81 = 8,315.42 : x
  2. Step 2: Convert to fraction form
    15,389.00/21,236.81 = 8,315.42/x
  3. Step 3: Cross multiply
    15,389.00x = 21,236.81 × 8,315.42
  4. Step 4: Simplify right side
    15,389.00x = 176,592,846.85
  5. Step 5: Solve for x
    x = 176,592,846.85/15,389.00
  6. Step 6: Final answer
    x = 11,475.27

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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.