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Finding the Fourth Proportional to 15,648.63, 21,595.64 and 8,574.99

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Solution

The fourth proportional to 15,648.63, 21,595.64 and 8,574.99 is: 11,833.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,648.63 : 21,595.64 = 8,574.99 : x
  2. Step 2: Convert to fraction form
    15,648.63/21,595.64 = 8,574.99/x
  3. Step 3: Cross multiply
    15,648.63x = 21,595.64 × 8,574.99
  4. Step 4: Simplify right side
    15,648.63x = 185,182,354.17
  5. Step 5: Solve for x
    x = 185,182,354.17/15,648.63
  6. Step 6: Final answer
    x = 11,833.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.