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Finding the Fourth Proportional to 28,646.34, 42,986.23 and 12,004.99

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Solution

The fourth proportional to 28,646.34, 42,986.23 and 12,004.99 is: 18,014.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,646.34 : 42,986.23 = 12,004.99 : x
  2. Step 2: Convert to fraction form
    28,646.34/42,986.23 = 12,004.99/x
  3. Step 3: Cross multiply
    28,646.34x = 42,986.23 × 12,004.99
  4. Step 4: Simplify right side
    28,646.34x = 516,049,123.81
  5. Step 5: Solve for x
    x = 516,049,123.81/28,646.34
  6. Step 6: Final answer
    x = 18,014.49

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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.