Home / 20,409.72-28,165.40-11,457.24

Finding the Fourth Proportional to 20,409.72, 28,165.40 and 11,457.24

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Solution

The fourth proportional to 20,409.72, 28,165.40 and 11,457.24 is: 15,810.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.72 : 28,165.40 = 11,457.24 : x
  2. Step 2: Convert to fraction form
    20,409.72/28,165.40 = 11,457.24/x
  3. Step 3: Cross multiply
    20,409.72x = 28,165.40 × 11,457.24
  4. Step 4: Simplify right side
    20,409.72x = 322,697,747.50
  5. Step 5: Solve for x
    x = 322,697,747.50/20,409.72
  6. Step 6: Final answer
    x = 15,810.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.