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Finding the Fourth Proportional to 28,588.21, 42,886.47 and 8,868.34

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Solution

The fourth proportional to 28,588.21, 42,886.47 and 8,868.34 is: 13,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,588.21 : 42,886.47 = 8,868.34 : x
  2. Step 2: Convert to fraction form
    28,588.21/42,886.47 = 8,868.34/x
  3. Step 3: Cross multiply
    28,588.21x = 42,886.47 × 8,868.34
  4. Step 4: Simplify right side
    28,588.21x = 380,331,797.36
  5. Step 5: Solve for x
    x = 380,331,797.36/28,588.21
  6. Step 6: Final answer
    x = 13,303.80

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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.