Home / 13,530.21-18,670.44-7,561.05

Finding the Fourth Proportional to 13,530.21, 18,670.44 and 7,561.05

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Solution

The fourth proportional to 13,530.21, 18,670.44 and 7,561.05 is: 10,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,530.21 : 18,670.44 = 7,561.05 : x
  2. Step 2: Convert to fraction form
    13,530.21/18,670.44 = 7,561.05/x
  3. Step 3: Cross multiply
    13,530.21x = 18,670.44 × 7,561.05
  4. Step 4: Simplify right side
    13,530.21x = 141,168,130.36
  5. Step 5: Solve for x
    x = 141,168,130.36/13,530.21
  6. Step 6: Final answer
    x = 10,433.55

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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.