Home / 13,420.89-20,130.93-5,629.50

Finding the Fourth Proportional to 13,420.89, 20,130.93 and 5,629.50

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Solution

The fourth proportional to 13,420.89, 20,130.93 and 5,629.50 is: 8,444.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.89 : 20,130.93 = 5,629.50 : x
  2. Step 2: Convert to fraction form
    13,420.89/20,130.93 = 5,629.50/x
  3. Step 3: Cross multiply
    13,420.89x = 20,130.93 × 5,629.50
  4. Step 4: Simplify right side
    13,420.89x = 113,327,070.44
  5. Step 5: Solve for x
    x = 113,327,070.44/13,420.89
  6. Step 6: Final answer
    x = 8,444.08

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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.