Home / 13,748.12-18,970.80-7,698.70

Finding the Fourth Proportional to 13,748.12, 18,970.80 and 7,698.70

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Solution

The fourth proportional to 13,748.12, 18,970.80 and 7,698.70 is: 10,623.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.12 : 18,970.80 = 7,698.70 : x
  2. Step 2: Convert to fraction form
    13,748.12/18,970.80 = 7,698.70/x
  3. Step 3: Cross multiply
    13,748.12x = 18,970.80 × 7,698.70
  4. Step 4: Simplify right side
    13,748.12x = 146,050,497.96
  5. Step 5: Solve for x
    x = 146,050,497.96/13,748.12
  6. Step 6: Final answer
    x = 10,623.31

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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.