Home / 13,656.12-18,845.81-7,688.01

Finding the Fourth Proportional to 13,656.12, 18,845.81 and 7,688.01

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Solution

The fourth proportional to 13,656.12, 18,845.81 and 7,688.01 is: 10,609.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.12 : 18,845.81 = 7,688.01 : x
  2. Step 2: Convert to fraction form
    13,656.12/18,845.81 = 7,688.01/x
  3. Step 3: Cross multiply
    13,656.12x = 18,845.81 × 7,688.01
  4. Step 4: Simplify right side
    13,656.12x = 144,886,737.30
  5. Step 5: Solve for x
    x = 144,886,737.30/13,656.12
  6. Step 6: Final answer
    x = 10,609.66

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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.