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Finding the Fourth Proportional to 12,655.94, 18,985.95 and 4,759.07

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Solution

The fourth proportional to 12,655.94, 18,985.95 and 4,759.07 is: 7,139.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.94 : 18,985.95 = 4,759.07 : x
  2. Step 2: Convert to fraction form
    12,655.94/18,985.95 = 4,759.07/x
  3. Step 3: Cross multiply
    12,655.94x = 18,985.95 × 4,759.07
  4. Step 4: Simplify right side
    12,655.94x = 90,355,370.14
  5. Step 5: Solve for x
    x = 90,355,370.14/12,655.94
  6. Step 6: Final answer
    x = 7,139.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.