Home / 13,620.08-20,430.20-4,856.40

Finding the Fourth Proportional to 13,620.08, 20,430.20 and 4,856.40

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Solution

The fourth proportional to 13,620.08, 20,430.20 and 4,856.40 is: 7,284.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.08 : 20,430.20 = 4,856.40 : x
  2. Step 2: Convert to fraction form
    13,620.08/20,430.20 = 4,856.40/x
  3. Step 3: Cross multiply
    13,620.08x = 20,430.20 × 4,856.40
  4. Step 4: Simplify right side
    13,620.08x = 99,217,223.28
  5. Step 5: Solve for x
    x = 99,217,223.28/13,620.08
  6. Step 6: Final answer
    x = 7,284.63

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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.