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Finding the Fourth Proportional to 13,485.16, 20,127.88 and 12,654.10

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Solution

The fourth proportional to 13,485.16, 20,127.88 and 12,654.10 is: 18,887.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.16 : 20,127.88 = 12,654.10 : x
  2. Step 2: Convert to fraction form
    13,485.16/20,127.88 = 12,654.10/x
  3. Step 3: Cross multiply
    13,485.16x = 20,127.88 × 12,654.10
  4. Step 4: Simplify right side
    13,485.16x = 254,700,206.31
  5. Step 5: Solve for x
    x = 254,700,206.31/13,485.16
  6. Step 6: Final answer
    x = 18,887.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.