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Finding the Fourth Proportional to 13,294.80, 18,230.40 and 12,808.80

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Solution

The fourth proportional to 13,294.80, 18,230.40 and 12,808.80 is: 17,563.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,294.80 : 18,230.40 = 12,808.80 : x
  2. Step 2: Convert to fraction form
    13,294.80/18,230.40 = 12,808.80/x
  3. Step 3: Cross multiply
    13,294.80x = 18,230.40 × 12,808.80
  4. Step 4: Simplify right side
    13,294.80x = 233,509,547.52
  5. Step 5: Solve for x
    x = 233,509,547.52/13,294.80
  6. Step 6: Final answer
    x = 17,563.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.