Home / 13,457.51-20,154.96-12,990.32

Finding the Fourth Proportional to 13,457.51, 20,154.96 and 12,990.32

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Solution

The fourth proportional to 13,457.51, 20,154.96 and 12,990.32 is: 19,455.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,457.51 : 20,154.96 = 12,990.32 : x
  2. Step 2: Convert to fraction form
    13,457.51/20,154.96 = 12,990.32/x
  3. Step 3: Cross multiply
    13,457.51x = 20,154.96 × 12,990.32
  4. Step 4: Simplify right side
    13,457.51x = 261,819,379.99
  5. Step 5: Solve for x
    x = 261,819,379.99/13,457.51
  6. Step 6: Final answer
    x = 19,455.26

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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.