Home / 20,570.36-28,366.95-12,505.11

Finding the Fourth Proportional to 20,570.36, 28,366.95 and 12,505.11

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Solution

The fourth proportional to 20,570.36, 28,366.95 and 12,505.11 is: 17,244.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.36 : 28,366.95 = 12,505.11 : x
  2. Step 2: Convert to fraction form
    20,570.36/28,366.95 = 12,505.11/x
  3. Step 3: Cross multiply
    20,570.36x = 28,366.95 × 12,505.11
  4. Step 4: Simplify right side
    20,570.36x = 354,731,830.11
  5. Step 5: Solve for x
    x = 354,731,830.11/20,570.36
  6. Step 6: Final answer
    x = 17,244.81

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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.