Home / 21,852.70-30,148.95-12,895.72

Finding the Fourth Proportional to 21,852.70, 30,148.95 and 12,895.72

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Solution

The fourth proportional to 21,852.70, 30,148.95 and 12,895.72 is: 17,791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.70 : 30,148.95 = 12,895.72 : x
  2. Step 2: Convert to fraction form
    21,852.70/30,148.95 = 12,895.72/x
  3. Step 3: Cross multiply
    21,852.70x = 30,148.95 × 12,895.72
  4. Step 4: Simplify right side
    21,852.70x = 388,792,417.49
  5. Step 5: Solve for x
    x = 388,792,417.49/21,852.70
  6. Step 6: Final answer
    x = 17,791.50

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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.