Home / 13,457.64-18,571.40-7,489.20

Finding the Fourth Proportional to 13,457.64, 18,571.40 and 7,489.20

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Solution

The fourth proportional to 13,457.64, 18,571.40 and 7,489.20 is: 10,335.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,457.64 : 18,571.40 = 7,489.20 : x
  2. Step 2: Convert to fraction form
    13,457.64/18,571.40 = 7,489.20/x
  3. Step 3: Cross multiply
    13,457.64x = 18,571.40 × 7,489.20
  4. Step 4: Simplify right side
    13,457.64x = 139,085,017.25
  5. Step 5: Solve for x
    x = 139,085,017.25/13,457.64
  6. Step 6: Final answer
    x = 10,335.03

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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.