Home / 11,457.21-15,811.40-6,421.48

Finding the Fourth Proportional to 11,457.21, 15,811.40 and 6,421.48

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Solution

The fourth proportional to 11,457.21, 15,811.40 and 6,421.48 is: 8,861.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,457.21 : 15,811.40 = 6,421.48 : x
  2. Step 2: Convert to fraction form
    11,457.21/15,811.40 = 6,421.48/x
  3. Step 3: Cross multiply
    11,457.21x = 15,811.40 × 6,421.48
  4. Step 4: Simplify right side
    11,457.21x = 101,532,565.40
  5. Step 5: Solve for x
    x = 101,532,565.40/11,457.21
  6. Step 6: Final answer
    x = 8,861.89

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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.