Home / 13,345.43-18,415.65-7,680.49

Finding the Fourth Proportional to 13,345.43, 18,415.65 and 7,680.49

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Solution

The fourth proportional to 13,345.43, 18,415.65 and 7,680.49 is: 10,598.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.43 : 18,415.65 = 7,680.49 : x
  2. Step 2: Convert to fraction form
    13,345.43/18,415.65 = 7,680.49/x
  3. Step 3: Cross multiply
    13,345.43x = 18,415.65 × 7,680.49
  4. Step 4: Simplify right side
    13,345.43x = 141,441,169.63
  5. Step 5: Solve for x
    x = 141,441,169.63/13,345.43
  6. Step 6: Final answer
    x = 10,598.48

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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.