Home / 21,435.42-29,576.12-12,938.94

Finding the Fourth Proportional to 21,435.42, 29,576.12 and 12,938.94

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Solution

The fourth proportional to 21,435.42, 29,576.12 and 12,938.94 is: 17,852.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.42 : 29,576.12 = 12,938.94 : x
  2. Step 2: Convert to fraction form
    21,435.42/29,576.12 = 12,938.94/x
  3. Step 3: Cross multiply
    21,435.42x = 29,576.12 × 12,938.94
  4. Step 4: Simplify right side
    21,435.42x = 382,683,642.11
  5. Step 5: Solve for x
    x = 382,683,642.11/21,435.42
  6. Step 6: Final answer
    x = 17,852.86

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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.