Home / 12,580.40-18,870.39-3,220.34

Finding the Fourth Proportional to 12,580.40, 18,870.39 and 3,220.34

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Solution

The fourth proportional to 12,580.40, 18,870.39 and 3,220.34 is: 4,830.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,580.40 : 18,870.39 = 3,220.34 : x
  2. Step 2: Convert to fraction form
    12,580.40/18,870.39 = 3,220.34/x
  3. Step 3: Cross multiply
    12,580.40x = 18,870.39 × 3,220.34
  4. Step 4: Simplify right side
    12,580.40x = 60,768,977.38
  5. Step 5: Solve for x
    x = 60,768,977.38/12,580.40
  6. Step 6: Final answer
    x = 4,830.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.