Home / 21,645.04-29,870.53-12,698.98

Finding the Fourth Proportional to 21,645.04, 29,870.53 and 12,698.98

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Solution

The fourth proportional to 21,645.04, 29,870.53 and 12,698.98 is: 17,524.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.04 : 29,870.53 = 12,698.98 : x
  2. Step 2: Convert to fraction form
    21,645.04/29,870.53 = 12,698.98/x
  3. Step 3: Cross multiply
    21,645.04x = 29,870.53 × 12,698.98
  4. Step 4: Simplify right side
    21,645.04x = 379,325,263.06
  5. Step 5: Solve for x
    x = 379,325,263.06/21,645.04
  6. Step 6: Final answer
    x = 17,524.81

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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.