Home / 28,485.64-39,308.15-15,738.68

Finding the Fourth Proportional to 28,485.64, 39,308.15 and 15,738.68

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Solution

The fourth proportional to 28,485.64, 39,308.15 and 15,738.68 is: 21,718.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.64 : 39,308.15 = 15,738.68 : x
  2. Step 2: Convert to fraction form
    28,485.64/39,308.15 = 15,738.68/x
  3. Step 3: Cross multiply
    28,485.64x = 39,308.15 × 15,738.68
  4. Step 4: Simplify right side
    28,485.64x = 618,658,531.86
  5. Step 5: Solve for x
    x = 618,658,531.86/28,485.64
  6. Step 6: Final answer
    x = 21,718.26

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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.