Home / 13,880.80-19,149.06-12,289.06

Finding the Fourth Proportional to 13,880.80, 19,149.06 and 12,289.06

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Solution

The fourth proportional to 13,880.80, 19,149.06 and 12,289.06 is: 16,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.80 : 19,149.06 = 12,289.06 : x
  2. Step 2: Convert to fraction form
    13,880.80/19,149.06 = 12,289.06/x
  3. Step 3: Cross multiply
    13,880.80x = 19,149.06 × 12,289.06
  4. Step 4: Simplify right side
    13,880.80x = 235,323,947.28
  5. Step 5: Solve for x
    x = 235,323,947.28/13,880.80
  6. Step 6: Final answer
    x = 16,953.20

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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.