Home / 28,580.51-39,428-18,512.19

Finding the Fourth Proportional to 28,580.51, 39,428 and 18,512.19

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Solution

The fourth proportional to 28,580.51, 39,428 and 18,512.19 is: 25,538.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,580.51 : 39,428 = 18,512.19 : x
  2. Step 2: Convert to fraction form
    28,580.51/39,428 = 18,512.19/x
  3. Step 3: Cross multiply
    28,580.51x = 39,428 × 18,512.19
  4. Step 4: Simplify right side
    28,580.51x = 729,898,627.32
  5. Step 5: Solve for x
    x = 729,898,627.32/28,580.51
  6. Step 6: Final answer
    x = 25,538.33

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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.