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Finding the Fourth Proportional to 35,986.98, 53,980.48 and 12,613.42

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Solution

The fourth proportional to 35,986.98, 53,980.48 and 12,613.42 is: 18,920.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,986.98 : 53,980.48 = 12,613.42 : x
  2. Step 2: Convert to fraction form
    35,986.98/53,980.48 = 12,613.42/x
  3. Step 3: Cross multiply
    35,986.98x = 53,980.48 × 12,613.42
  4. Step 4: Simplify right side
    35,986.98x = 680,878,466.04
  5. Step 5: Solve for x
    x = 680,878,466.04/35,986.98
  6. Step 6: Final answer
    x = 18,920.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.