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Finding the Fourth Proportional to 14,263.90, 19,683.81 and 7,890.32

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Solution

The fourth proportional to 14,263.90, 19,683.81 and 7,890.32 is: 10,888.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,263.90 : 19,683.81 = 7,890.32 : x
  2. Step 2: Convert to fraction form
    14,263.90/19,683.81 = 7,890.32/x
  3. Step 3: Cross multiply
    14,263.90x = 19,683.81 × 7,890.32
  4. Step 4: Simplify right side
    14,263.90x = 155,311,608.93
  5. Step 5: Solve for x
    x = 155,311,608.93/14,263.90
  6. Step 6: Final answer
    x = 10,888.44

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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.