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Finding the Fourth Proportional to 15,283.48, 21,072.16 and 12,090.48

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Solution

The fourth proportional to 15,283.48, 21,072.16 and 12,090.48 is: 16,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,283.48 : 21,072.16 = 12,090.48 : x
  2. Step 2: Convert to fraction form
    15,283.48/21,072.16 = 12,090.48/x
  3. Step 3: Cross multiply
    15,283.48x = 21,072.16 × 12,090.48
  4. Step 4: Simplify right side
    15,283.48x = 254,772,529.04
  5. Step 5: Solve for x
    x = 254,772,529.04/15,283.48
  6. Step 6: Final answer
    x = 16,669.80

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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.