Home / 14,412.80-19,880.57-9,928.78

Finding the Fourth Proportional to 14,412.80, 19,880.57 and 9,928.78

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Solution

The fourth proportional to 14,412.80, 19,880.57 and 9,928.78 is: 13,695.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,412.80 : 19,880.57 = 9,928.78 : x
  2. Step 2: Convert to fraction form
    14,412.80/19,880.57 = 9,928.78/x
  3. Step 3: Cross multiply
    14,412.80x = 19,880.57 × 9,928.78
  4. Step 4: Simplify right side
    14,412.80x = 197,389,780.93
  5. Step 5: Solve for x
    x = 197,389,780.93/14,412.80
  6. Step 6: Final answer
    x = 13,695.45

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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.