Home / 20,655.08-28,506.40-12,271.56

Finding the Fourth Proportional to 20,655.08, 28,506.40 and 12,271.56

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Solution

The fourth proportional to 20,655.08, 28,506.40 and 12,271.56 is: 16,936.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.08 : 28,506.40 = 12,271.56 : x
  2. Step 2: Convert to fraction form
    20,655.08/28,506.40 = 12,271.56/x
  3. Step 3: Cross multiply
    20,655.08x = 28,506.40 × 12,271.56
  4. Step 4: Simplify right side
    20,655.08x = 349,817,997.98
  5. Step 5: Solve for x
    x = 349,817,997.98/20,655.08
  6. Step 6: Final answer
    x = 16,936.17

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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.