Home / 21,416.51-31,971.48-18,614.76

Finding the Fourth Proportional to 21,416.51, 31,971.48 and 18,614.76

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Solution

The fourth proportional to 21,416.51, 31,971.48 and 18,614.76 is: 27,788.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.51 : 31,971.48 = 18,614.76 : x
  2. Step 2: Convert to fraction form
    21,416.51/31,971.48 = 18,614.76/x
  3. Step 3: Cross multiply
    21,416.51x = 31,971.48 × 18,614.76
  4. Step 4: Simplify right side
    21,416.51x = 595,141,574.25
  5. Step 5: Solve for x
    x = 595,141,574.25/21,416.51
  6. Step 6: Final answer
    x = 27,788.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.