Home / 13,643.04-18,830.72-12,858.79

Finding the Fourth Proportional to 13,643.04, 18,830.72 and 12,858.79

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Solution

The fourth proportional to 13,643.04, 18,830.72 and 12,858.79 is: 17,748.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,643.04 : 18,830.72 = 12,858.79 : x
  2. Step 2: Convert to fraction form
    13,643.04/18,830.72 = 12,858.79/x
  3. Step 3: Cross multiply
    13,643.04x = 18,830.72 × 12,858.79
  4. Step 4: Simplify right side
    13,643.04x = 242,140,237.09
  5. Step 5: Solve for x
    x = 242,140,237.09/13,643.04
  6. Step 6: Final answer
    x = 17,748.27

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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.