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Finding the Fourth Proportional to 28,605.42, 42,899.76 and 11,071.08

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Solution

The fourth proportional to 28,605.42, 42,899.76 and 11,071.08 is: 16,603.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.42 : 42,899.76 = 11,071.08 : x
  2. Step 2: Convert to fraction form
    28,605.42/42,899.76 = 11,071.08/x
  3. Step 3: Cross multiply
    28,605.42x = 42,899.76 × 11,071.08
  4. Step 4: Simplify right side
    28,605.42x = 474,946,674.94
  5. Step 5: Solve for x
    x = 474,946,674.94/28,605.42
  6. Step 6: Final answer
    x = 16,603.38

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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.