Home / 21,051.79-31,423.57-18,560.74

Finding the Fourth Proportional to 21,051.79, 31,423.57 and 18,560.74

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Solution

The fourth proportional to 21,051.79, 31,423.57 and 18,560.74 is: 27,705.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.79 : 31,423.57 = 18,560.74 : x
  2. Step 2: Convert to fraction form
    21,051.79/31,423.57 = 18,560.74/x
  3. Step 3: Cross multiply
    21,051.79x = 31,423.57 × 18,560.74
  4. Step 4: Simplify right side
    21,051.79x = 583,244,712.64
  5. Step 5: Solve for x
    x = 583,244,712.64/21,051.79
  6. Step 6: Final answer
    x = 27,705.23

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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.