Home / 12,355.70-18,533.55-5,430.20

Finding the Fourth Proportional to 12,355.70, 18,533.55 and 5,430.20

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Solution

The fourth proportional to 12,355.70, 18,533.55 and 5,430.20 is: 8,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.70 : 18,533.55 = 5,430.20 : x
  2. Step 2: Convert to fraction form
    12,355.70/18,533.55 = 5,430.20/x
  3. Step 3: Cross multiply
    12,355.70x = 18,533.55 × 5,430.20
  4. Step 4: Simplify right side
    12,355.70x = 100,640,883.21
  5. Step 5: Solve for x
    x = 100,640,883.21/12,355.70
  6. Step 6: Final answer
    x = 8,145.30

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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.