Home / 13,615.04-18,774.88-12,821.32

Finding the Fourth Proportional to 13,615.04, 18,774.88 and 12,821.32

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Solution

The fourth proportional to 13,615.04, 18,774.88 and 12,821.32 is: 17,680.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.04 : 18,774.88 = 12,821.32 : x
  2. Step 2: Convert to fraction form
    13,615.04/18,774.88 = 12,821.32/x
  3. Step 3: Cross multiply
    13,615.04x = 18,774.88 × 12,821.32
  4. Step 4: Simplify right side
    13,615.04x = 240,718,744.44
  5. Step 5: Solve for x
    x = 240,718,744.44/13,615.04
  6. Step 6: Final answer
    x = 17,680.36

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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.