Home / 13,136.90-18,108.81-9,348.74

Finding the Fourth Proportional to 13,136.90, 18,108.81 and 9,348.74

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Solution

The fourth proportional to 13,136.90, 18,108.81 and 9,348.74 is: 12,886.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.90 : 18,108.81 = 9,348.74 : x
  2. Step 2: Convert to fraction form
    13,136.90/18,108.81 = 9,348.74/x
  3. Step 3: Cross multiply
    13,136.90x = 18,108.81 × 9,348.74
  4. Step 4: Simplify right side
    13,136.90x = 169,294,556.40
  5. Step 5: Solve for x
    x = 169,294,556.40/13,136.90
  6. Step 6: Final answer
    x = 12,886.95

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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.