Home / 10,399.21-14,349.21-6,421.60

Finding the Fourth Proportional to 10,399.21, 14,349.21 and 6,421.60

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Solution

The fourth proportional to 10,399.21, 14,349.21 and 6,421.60 is: 8,860.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,399.21 : 14,349.21 = 6,421.60 : x
  2. Step 2: Convert to fraction form
    10,399.21/14,349.21 = 6,421.60/x
  3. Step 3: Cross multiply
    10,399.21x = 14,349.21 × 6,421.60
  4. Step 4: Simplify right side
    10,399.21x = 92,144,886.94
  5. Step 5: Solve for x
    x = 92,144,886.94/10,399.21
  6. Step 6: Final answer
    x = 8,860.76

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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.