Home / 13,830.58-19,088.85-12,986.56

Finding the Fourth Proportional to 13,830.58, 19,088.85 and 12,986.56

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Solution

The fourth proportional to 13,830.58, 19,088.85 and 12,986.56 is: 17,923.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830.58 : 19,088.85 = 12,986.56 : x
  2. Step 2: Convert to fraction form
    13,830.58/19,088.85 = 12,986.56/x
  3. Step 3: Cross multiply
    13,830.58x = 19,088.85 × 12,986.56
  4. Step 4: Simplify right side
    13,830.58x = 247,898,495.86
  5. Step 5: Solve for x
    x = 247,898,495.86/13,830.58
  6. Step 6: Final answer
    x = 17,923.94

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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.