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Finding the Fourth Proportional to 28,636.64, 39,509.04 and 17,309.60

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Solution

The fourth proportional to 28,636.64, 39,509.04 and 17,309.60 is: 23,881.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,636.64 : 39,509.04 = 17,309.60 : x
  2. Step 2: Convert to fraction form
    28,636.64/39,509.04 = 17,309.60/x
  3. Step 3: Cross multiply
    28,636.64x = 39,509.04 × 17,309.60
  4. Step 4: Simplify right side
    28,636.64x = 683,885,678.78
  5. Step 5: Solve for x
    x = 683,885,678.78/28,636.64
  6. Step 6: Final answer
    x = 23,881.49

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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.