Home / 20,703.09-28,570.40-11,271.75

Finding the Fourth Proportional to 20,703.09, 28,570.40 and 11,271.75

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Solution

The fourth proportional to 20,703.09, 28,570.40 and 11,271.75 is: 15,555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.09 : 28,570.40 = 11,271.75 : x
  2. Step 2: Convert to fraction form
    20,703.09/28,570.40 = 11,271.75/x
  3. Step 3: Cross multiply
    20,703.09x = 28,570.40 × 11,271.75
  4. Step 4: Simplify right side
    20,703.09x = 322,038,349.84
  5. Step 5: Solve for x
    x = 322,038,349.84/20,703.09
  6. Step 6: Final answer
    x = 15,555.09

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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.