Home / 28,196.40-38,871.54-19,686.36

Finding the Fourth Proportional to 28,196.40, 38,871.54 and 19,686.36

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Solution

The fourth proportional to 28,196.40, 38,871.54 and 19,686.36 is: 27,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,196.40 : 38,871.54 = 19,686.36 : x
  2. Step 2: Convert to fraction form
    28,196.40/38,871.54 = 19,686.36/x
  3. Step 3: Cross multiply
    28,196.40x = 38,871.54 × 19,686.36
  4. Step 4: Simplify right side
    28,196.40x = 765,239,130.19
  5. Step 5: Solve for x
    x = 765,239,130.19/28,196.40
  6. Step 6: Final answer
    x = 27,139.60

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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.