Home / 21,833.64-30,128.63-12,881.52

Finding the Fourth Proportional to 21,833.64, 30,128.63 and 12,881.52

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Solution

The fourth proportional to 21,833.64, 30,128.63 and 12,881.52 is: 17,775.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,833.64 : 30,128.63 = 12,881.52 : x
  2. Step 2: Convert to fraction form
    21,833.64/30,128.63 = 12,881.52/x
  3. Step 3: Cross multiply
    21,833.64x = 30,128.63 × 12,881.52
  4. Step 4: Simplify right side
    21,833.64x = 388,102,485.51
  5. Step 5: Solve for x
    x = 388,102,485.51/21,833.64
  6. Step 6: Final answer
    x = 17,775.44

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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.