Home / 13,609.49-18,783.12-8,307.36

Finding the Fourth Proportional to 13,609.49, 18,783.12 and 8,307.36

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Solution

The fourth proportional to 13,609.49, 18,783.12 and 8,307.36 is: 11,465.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.49 : 18,783.12 = 8,307.36 : x
  2. Step 2: Convert to fraction form
    13,609.49/18,783.12 = 8,307.36/x
  3. Step 3: Cross multiply
    13,609.49x = 18,783.12 × 8,307.36
  4. Step 4: Simplify right side
    13,609.49x = 156,038,170.92
  5. Step 5: Solve for x
    x = 156,038,170.92/13,609.49
  6. Step 6: Final answer
    x = 11,465.40

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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.