Home / 13,520.05-18,670.44-12,783.76

Finding the Fourth Proportional to 13,520.05, 18,670.44 and 12,783.76

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Solution

The fourth proportional to 13,520.05, 18,670.44 and 12,783.76 is: 17,653.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.05 : 18,670.44 = 12,783.76 : x
  2. Step 2: Convert to fraction form
    13,520.05/18,670.44 = 12,783.76/x
  3. Step 3: Cross multiply
    13,520.05x = 18,670.44 × 12,783.76
  4. Step 4: Simplify right side
    13,520.05x = 238,678,424.05
  5. Step 5: Solve for x
    x = 238,678,424.05/13,520.05
  6. Step 6: Final answer
    x = 17,653.66

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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.