Home / 20,670.69-28,526.13-12,708.39

Finding the Fourth Proportional to 20,670.69, 28,526.13 and 12,708.39

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Solution

The fourth proportional to 20,670.69, 28,526.13 and 12,708.39 is: 17,537.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.69 : 28,526.13 = 12,708.39 : x
  2. Step 2: Convert to fraction form
    20,670.69/28,526.13 = 12,708.39/x
  3. Step 3: Cross multiply
    20,670.69x = 28,526.13 × 12,708.39
  4. Step 4: Simplify right side
    20,670.69x = 362,521,185.23
  5. Step 5: Solve for x
    x = 362,521,185.23/20,670.69
  6. Step 6: Final answer
    x = 17,537.93

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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.