Home / 28,612.79-39,485.73-15,866.87

Finding the Fourth Proportional to 28,612.79, 39,485.73 and 15,866.87

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Solution

The fourth proportional to 28,612.79, 39,485.73 and 15,866.87 is: 21,896.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.79 : 39,485.73 = 15,866.87 : x
  2. Step 2: Convert to fraction form
    28,612.79/39,485.73 = 15,866.87/x
  3. Step 3: Cross multiply
    28,612.79x = 39,485.73 × 15,866.87
  4. Step 4: Simplify right side
    28,612.79x = 626,514,885.72
  5. Step 5: Solve for x
    x = 626,514,885.72/28,612.79
  6. Step 6: Final answer
    x = 21,896.32

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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.