Home / 20,970.99-28,939.95-12,018.06

Finding the Fourth Proportional to 20,970.99, 28,939.95 and 12,018.06

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Solution

The fourth proportional to 20,970.99, 28,939.95 and 12,018.06 is: 16,584.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.99 : 28,939.95 = 12,018.06 : x
  2. Step 2: Convert to fraction form
    20,970.99/28,939.95 = 12,018.06/x
  3. Step 3: Cross multiply
    20,970.99x = 28,939.95 × 12,018.06
  4. Step 4: Simplify right side
    20,970.99x = 347,802,055.50
  5. Step 5: Solve for x
    x = 347,802,055.50/20,970.99
  6. Step 6: Final answer
    x = 16,584.91

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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.