Home / 13,977.80-19,289.36-7,690.17

Finding the Fourth Proportional to 13,977.80, 19,289.36 and 7,690.17

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Solution

The fourth proportional to 13,977.80, 19,289.36 and 7,690.17 is: 10,612.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.80 : 19,289.36 = 7,690.17 : x
  2. Step 2: Convert to fraction form
    13,977.80/19,289.36 = 7,690.17/x
  3. Step 3: Cross multiply
    13,977.80x = 19,289.36 × 7,690.17
  4. Step 4: Simplify right side
    13,977.80x = 148,338,457.59
  5. Step 5: Solve for x
    x = 148,338,457.59/13,977.80
  6. Step 6: Final answer
    x = 10,612.43

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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.