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Finding the Fourth Proportional to 14,485.62, 19,989.93 and 7,861.62

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Solution

The fourth proportional to 14,485.62, 19,989.93 and 7,861.62 is: 10,848.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.62 : 19,989.93 = 7,861.62 : x
  2. Step 2: Convert to fraction form
    14,485.62/19,989.93 = 7,861.62/x
  3. Step 3: Cross multiply
    14,485.62x = 19,989.93 × 7,861.62
  4. Step 4: Simplify right side
    14,485.62x = 157,153,233.49
  5. Step 5: Solve for x
    x = 157,153,233.49/14,485.62
  6. Step 6: Final answer
    x = 10,848.91

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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.