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Finding the Fourth Proportional to 13,487.79, 18,606.87 and 8,706.51

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Solution

The fourth proportional to 13,487.79, 18,606.87 and 8,706.51 is: 12,010.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.79 : 18,606.87 = 8,706.51 : x
  2. Step 2: Convert to fraction form
    13,487.79/18,606.87 = 8,706.51/x
  3. Step 3: Cross multiply
    13,487.79x = 18,606.87 × 8,706.51
  4. Step 4: Simplify right side
    13,487.79x = 162,000,899.72
  5. Step 5: Solve for x
    x = 162,000,899.72/13,487.79
  6. Step 6: Final answer
    x = 12,010.93

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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.