Home / 13,289.79-18,322.80-10,890.98

Finding the Fourth Proportional to 13,289.79, 18,322.80 and 10,890.98

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Solution

The fourth proportional to 13,289.79, 18,322.80 and 10,890.98 is: 15,015.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.79 : 18,322.80 = 10,890.98 : x
  2. Step 2: Convert to fraction form
    13,289.79/18,322.80 = 10,890.98/x
  3. Step 3: Cross multiply
    13,289.79x = 18,322.80 × 10,890.98
  4. Step 4: Simplify right side
    13,289.79x = 199,553,156.73
  5. Step 5: Solve for x
    x = 199,553,156.73/13,289.79
  6. Step 6: Final answer
    x = 15,015.52

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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.