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Finding the Fourth Proportional to 15,586.92, 21,509.64 and 8,513.28

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Solution

The fourth proportional to 15,586.92, 21,509.64 and 8,513.28 is: 11,748.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,586.92 : 21,509.64 = 8,513.28 : x
  2. Step 2: Convert to fraction form
    15,586.92/21,509.64 = 8,513.28/x
  3. Step 3: Cross multiply
    15,586.92x = 21,509.64 × 8,513.28
  4. Step 4: Simplify right side
    15,586.92x = 183,117,588.02
  5. Step 5: Solve for x
    x = 183,117,588.02/15,586.92
  6. Step 6: Final answer
    x = 11,748.16

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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.