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Finding the Fourth Proportional to 13,015.95, 19,509.95 and 5,623.89

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Solution

The fourth proportional to 13,015.95, 19,509.95 and 5,623.89 is: 8,429.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015.95 : 19,509.95 = 5,623.89 : x
  2. Step 2: Convert to fraction form
    13,015.95/19,509.95 = 5,623.89/x
  3. Step 3: Cross multiply
    13,015.95x = 19,509.95 × 5,623.89
  4. Step 4: Simplify right side
    13,015.95x = 109,721,784.59
  5. Step 5: Solve for x
    x = 109,721,784.59/13,015.95
  6. Step 6: Final answer
    x = 8,429.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.