Home / 6,420.32-8,851.96-4,909.74

Finding the Fourth Proportional to 6,420.32, 8,851.96 and 4,909.74

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Solution

The fourth proportional to 6,420.32, 8,851.96 and 4,909.74 is: 6,769.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.32 : 8,851.96 = 4,909.74 : x
  2. Step 2: Convert to fraction form
    6,420.32/8,851.96 = 4,909.74/x
  3. Step 3: Cross multiply
    6,420.32x = 8,851.96 × 4,909.74
  4. Step 4: Simplify right side
    6,420.32x = 43,460,822.09
  5. Step 5: Solve for x
    x = 43,460,822.09/6,420.32
  6. Step 6: Final answer
    x = 6,769.26

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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.