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Finding the Fourth Proportional to 13,607, 18,777.30 and 7,639.32

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Solution

The fourth proportional to 13,607, 18,777.30 and 7,639.32 is: 10,542.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607 : 18,777.30 = 7,639.32 : x
  2. Step 2: Convert to fraction form
    13,607/18,777.30 = 7,639.32/x
  3. Step 3: Cross multiply
    13,607x = 18,777.30 × 7,639.32
  4. Step 4: Simplify right side
    13,607x = 143,445,803.44
  5. Step 5: Solve for x
    x = 143,445,803.44/13,607
  6. Step 6: Final answer
    x = 10,542.06

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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.