Home / 13,448.80-18,561.61-7,783.70

Finding the Fourth Proportional to 13,448.80, 18,561.61 and 7,783.70

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Solution

The fourth proportional to 13,448.80, 18,561.61 and 7,783.70 is: 10,742.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,448.80 : 18,561.61 = 7,783.70 : x
  2. Step 2: Convert to fraction form
    13,448.80/18,561.61 = 7,783.70/x
  3. Step 3: Cross multiply
    13,448.80x = 18,561.61 × 7,783.70
  4. Step 4: Simplify right side
    13,448.80x = 144,477,964.84
  5. Step 5: Solve for x
    x = 144,477,964.84/13,448.80
  6. Step 6: Final answer
    x = 10,742.82

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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.