Home / 28,455.63-39,268.88-15,708.91

Finding the Fourth Proportional to 28,455.63, 39,268.88 and 15,708.91

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Solution

The fourth proportional to 28,455.63, 39,268.88 and 15,708.91 is: 21,678.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.63 : 39,268.88 = 15,708.91 : x
  2. Step 2: Convert to fraction form
    28,455.63/39,268.88 = 15,708.91/x
  3. Step 3: Cross multiply
    28,455.63x = 39,268.88 × 15,708.91
  4. Step 4: Simplify right side
    28,455.63x = 616,871,331.17
  5. Step 5: Solve for x
    x = 616,871,331.17/28,455.63
  6. Step 6: Final answer
    x = 21,678.36

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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.