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Finding the Fourth Proportional to 15,756.63, 21,743.72 and 8,586.39

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Solution

The fourth proportional to 15,756.63, 21,743.72 and 8,586.39 is: 11,848.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.63 : 21,743.72 = 8,586.39 : x
  2. Step 2: Convert to fraction form
    15,756.63/21,743.72 = 8,586.39/x
  3. Step 3: Cross multiply
    15,756.63x = 21,743.72 × 8,586.39
  4. Step 4: Simplify right side
    15,756.63x = 186,700,017.04
  5. Step 5: Solve for x
    x = 186,700,017.04/15,756.63
  6. Step 6: Final answer
    x = 11,848.98

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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.