Home / 21,303.75-31,983.90-18,203.67

Finding the Fourth Proportional to 21,303.75, 31,983.90 and 18,203.67

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Solution

The fourth proportional to 21,303.75, 31,983.90 and 18,203.67 is: 27,329.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.75 : 31,983.90 = 18,203.67 : x
  2. Step 2: Convert to fraction form
    21,303.75/31,983.90 = 18,203.67/x
  3. Step 3: Cross multiply
    21,303.75x = 31,983.90 × 18,203.67
  4. Step 4: Simplify right side
    21,303.75x = 582,224,360.91
  5. Step 5: Solve for x
    x = 582,224,360.91/21,303.75
  6. Step 6: Final answer
    x = 27,329.67

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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.