Home / 13,683.74-18,883.48-7,715.45

Finding the Fourth Proportional to 13,683.74, 18,883.48 and 7,715.45

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Solution

The fourth proportional to 13,683.74, 18,883.48 and 7,715.45 is: 10,647.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,683.74 : 18,883.48 = 7,715.45 : x
  2. Step 2: Convert to fraction form
    13,683.74/18,883.48 = 7,715.45/x
  3. Step 3: Cross multiply
    13,683.74x = 18,883.48 × 7,715.45
  4. Step 4: Simplify right side
    13,683.74x = 145,694,588.15
  5. Step 5: Solve for x
    x = 145,694,588.15/13,683.74
  6. Step 6: Final answer
    x = 10,647.28

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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.