Home / 13,772.31-18,970.34-10,782.81

Finding the Fourth Proportional to 13,772.31, 18,970.34 and 10,782.81

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Solution

The fourth proportional to 13,772.31, 18,970.34 and 10,782.81 is: 14,852.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772.31 : 18,970.34 = 10,782.81 : x
  2. Step 2: Convert to fraction form
    13,772.31/18,970.34 = 10,782.81/x
  3. Step 3: Cross multiply
    13,772.31x = 18,970.34 × 10,782.81
  4. Step 4: Simplify right side
    13,772.31x = 204,553,517.94
  5. Step 5: Solve for x
    x = 204,553,517.94/13,772.31
  6. Step 6: Final answer
    x = 14,852.52

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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.