Home / 28,215.07-38,918.28-18,127.60

Finding the Fourth Proportional to 28,215.07, 38,918.28 and 18,127.60

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Solution

The fourth proportional to 28,215.07, 38,918.28 and 18,127.60 is: 25,004.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.07 : 38,918.28 = 18,127.60 : x
  2. Step 2: Convert to fraction form
    28,215.07/38,918.28 = 18,127.60/x
  3. Step 3: Cross multiply
    28,215.07x = 38,918.28 × 18,127.60
  4. Step 4: Simplify right side
    28,215.07x = 705,495,012.53
  5. Step 5: Solve for x
    x = 705,495,012.53/28,215.07
  6. Step 6: Final answer
    x = 25,004.19

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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.