Home / 20,918.46-31,368.48-9,828.30

Finding the Fourth Proportional to 20,918.46, 31,368.48 and 9,828.30

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Solution

The fourth proportional to 20,918.46, 31,368.48 and 9,828.30 is: 14,738.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.46 : 31,368.48 = 9,828.30 : x
  2. Step 2: Convert to fraction form
    20,918.46/31,368.48 = 9,828.30/x
  3. Step 3: Cross multiply
    20,918.46x = 31,368.48 × 9,828.30
  4. Step 4: Simplify right side
    20,918.46x = 308,298,831.98
  5. Step 5: Solve for x
    x = 308,298,831.98/20,918.46
  6. Step 6: Final answer
    x = 14,738.12

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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.