Home / 21,431.70-29,574.71-11,870.94

Finding the Fourth Proportional to 21,431.70, 29,574.71 and 11,870.94

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Solution

The fourth proportional to 21,431.70, 29,574.71 and 11,870.94 is: 16,381.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.70 : 29,574.71 = 11,870.94 : x
  2. Step 2: Convert to fraction form
    21,431.70/29,574.71 = 11,870.94/x
  3. Step 3: Cross multiply
    21,431.70x = 29,574.71 × 11,870.94
  4. Step 4: Simplify right side
    21,431.70x = 351,079,482.18
  5. Step 5: Solve for x
    x = 351,079,482.18/21,431.70
  6. Step 6: Final answer
    x = 16,381.32

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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.