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Finding the Fourth Proportional to 21,365.58, 32,053.86 and 15,368.57

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Solution

The fourth proportional to 21,365.58, 32,053.86 and 15,368.57 is: 23,056.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.58 : 32,053.86 = 15,368.57 : x
  2. Step 2: Convert to fraction form
    21,365.58/32,053.86 = 15,368.57/x
  3. Step 3: Cross multiply
    21,365.58x = 32,053.86 × 15,368.57
  4. Step 4: Simplify right side
    21,365.58x = 492,621,830.91
  5. Step 5: Solve for x
    x = 492,621,830.91/21,365.58
  6. Step 6: Final answer
    x = 23,056.80

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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.