Home / 28,135.79-38,825.95-15,386.49

Finding the Fourth Proportional to 28,135.79, 38,825.95 and 15,386.49

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Solution

The fourth proportional to 28,135.79, 38,825.95 and 15,386.49 is: 21,232.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.79 : 38,825.95 = 15,386.49 : x
  2. Step 2: Convert to fraction form
    28,135.79/38,825.95 = 15,386.49/x
  3. Step 3: Cross multiply
    28,135.79x = 38,825.95 × 15,386.49
  4. Step 4: Simplify right side
    28,135.79x = 597,395,091.42
  5. Step 5: Solve for x
    x = 597,395,091.42/28,135.79
  6. Step 6: Final answer
    x = 21,232.57

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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.