Home / 14,656.80-20,224.40-8,688.72

Finding the Fourth Proportional to 14,656.80, 20,224.40 and 8,688.72

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Solution

The fourth proportional to 14,656.80, 20,224.40 and 8,688.72 is: 11,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,656.80 : 20,224.40 = 8,688.72 : x
  2. Step 2: Convert to fraction form
    14,656.80/20,224.40 = 8,688.72/x
  3. Step 3: Cross multiply
    14,656.80x = 20,224.40 × 8,688.72
  4. Step 4: Simplify right side
    14,656.80x = 175,724,148.77
  5. Step 5: Solve for x
    x = 175,724,148.77/14,656.80
  6. Step 6: Final answer
    x = 11,989.26

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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.