Home / 20,941.23-28,900.26-12,988.74

Finding the Fourth Proportional to 20,941.23, 28,900.26 and 12,988.74

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Solution

The fourth proportional to 20,941.23, 28,900.26 and 12,988.74 is: 17,925.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.23 : 28,900.26 = 12,988.74 : x
  2. Step 2: Convert to fraction form
    20,941.23/28,900.26 = 12,988.74/x
  3. Step 3: Cross multiply
    20,941.23x = 28,900.26 × 12,988.74
  4. Step 4: Simplify right side
    20,941.23x = 375,377,963.07
  5. Step 5: Solve for x
    x = 375,377,963.07/20,941.23
  6. Step 6: Final answer
    x = 17,925.31

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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.