Home / 21,421.51-29,557.56-13,866.79

Finding the Fourth Proportional to 21,421.51, 29,557.56 and 13,866.79

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Solution

The fourth proportional to 21,421.51, 29,557.56 and 13,866.79 is: 19,133.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.51 : 29,557.56 = 13,866.79 : x
  2. Step 2: Convert to fraction form
    21,421.51/29,557.56 = 13,866.79/x
  3. Step 3: Cross multiply
    21,421.51x = 29,557.56 × 13,866.79
  4. Step 4: Simplify right side
    21,421.51x = 409,868,477.43
  5. Step 5: Solve for x
    x = 409,868,477.43/21,421.51
  6. Step 6: Final answer
    x = 19,133.50

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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.