Home / 20,941.48-28,900.61-12,988.99

Finding the Fourth Proportional to 20,941.48, 28,900.61 and 12,988.99

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Solution

The fourth proportional to 20,941.48, 28,900.61 and 12,988.99 is: 17,925.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.48 : 28,900.61 = 12,988.99 : x
  2. Step 2: Convert to fraction form
    20,941.48/28,900.61 = 12,988.99/x
  3. Step 3: Cross multiply
    20,941.48x = 28,900.61 × 12,988.99
  4. Step 4: Simplify right side
    20,941.48x = 375,389,734.28
  5. Step 5: Solve for x
    x = 375,389,734.28/20,941.48
  6. Step 6: Final answer
    x = 17,925.65

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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.