Home / 39,128.40-53,980.43-26,389.80

Finding the Fourth Proportional to 39,128.40, 53,980.43 and 26,389.80

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Solution

The fourth proportional to 39,128.40, 53,980.43 and 26,389.80 is: 36,406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128.40 : 53,980.43 = 26,389.80 : x
  2. Step 2: Convert to fraction form
    39,128.40/53,980.43 = 26,389.80/x
  3. Step 3: Cross multiply
    39,128.40x = 53,980.43 × 26,389.80
  4. Step 4: Simplify right side
    39,128.40x = 1,424,532,619.67
  5. Step 5: Solve for x
    x = 1,424,532,619.67/39,128.40
  6. Step 6: Final answer
    x = 36,406.62

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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.