Home / 13,457.80-20,155.41-12,990.63

Finding the Fourth Proportional to 13,457.80, 20,155.41 and 12,990.63

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Solution

The fourth proportional to 13,457.80, 20,155.41 and 12,990.63 is: 19,455.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,457.80 : 20,155.41 = 12,990.63 : x
  2. Step 2: Convert to fraction form
    13,457.80/20,155.41 = 12,990.63/x
  3. Step 3: Cross multiply
    13,457.80x = 20,155.41 × 12,990.63
  4. Step 4: Simplify right side
    13,457.80x = 261,831,399.48
  5. Step 5: Solve for x
    x = 261,831,399.48/13,457.80
  6. Step 6: Final answer
    x = 19,455.74

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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.