Home / 20,703.15-28,570.37-11,271.51

Finding the Fourth Proportional to 20,703.15, 28,570.37 and 11,271.51

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Solution

The fourth proportional to 20,703.15, 28,570.37 and 11,271.51 is: 15,554.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.15 : 28,570.37 = 11,271.51 : x
  2. Step 2: Convert to fraction form
    20,703.15/28,570.37 = 11,271.51/x
  3. Step 3: Cross multiply
    20,703.15x = 28,570.37 × 11,271.51
  4. Step 4: Simplify right side
    20,703.15x = 322,031,154.80
  5. Step 5: Solve for x
    x = 322,031,154.80/20,703.15
  6. Step 6: Final answer
    x = 15,554.69

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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.