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Finding the Fourth Proportional to 28,611.16, 42,905.22 and 9,888.28

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Solution

The fourth proportional to 28,611.16, 42,905.22 and 9,888.28 is: 14,828.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.16 : 42,905.22 = 9,888.28 : x
  2. Step 2: Convert to fraction form
    28,611.16/42,905.22 = 9,888.28/x
  3. Step 3: Cross multiply
    28,611.16x = 42,905.22 × 9,888.28
  4. Step 4: Simplify right side
    28,611.16x = 424,258,828.82
  5. Step 5: Solve for x
    x = 424,258,828.82/28,611.16
  6. Step 6: Final answer
    x = 14,828.44

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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.