Home / 13,136.79-18,128.05-7,470.77

Finding the Fourth Proportional to 13,136.79, 18,128.05 and 7,470.77

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Solution

The fourth proportional to 13,136.79, 18,128.05 and 7,470.77 is: 10,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.79 : 18,128.05 = 7,470.77 : x
  2. Step 2: Convert to fraction form
    13,136.79/18,128.05 = 7,470.77/x
  3. Step 3: Cross multiply
    13,136.79x = 18,128.05 × 7,470.77
  4. Step 4: Simplify right side
    13,136.79x = 135,430,492.10
  5. Step 5: Solve for x
    x = 135,430,492.10/13,136.79
  6. Step 6: Final answer
    x = 10,309.25

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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.