Home / 20,981.07-28,950.48-12,483.45

Finding the Fourth Proportional to 20,981.07, 28,950.48 and 12,483.45

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Solution

The fourth proportional to 20,981.07, 28,950.48 and 12,483.45 is: 17,225.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.07 : 28,950.48 = 12,483.45 : x
  2. Step 2: Convert to fraction form
    20,981.07/28,950.48 = 12,483.45/x
  3. Step 3: Cross multiply
    20,981.07x = 28,950.48 × 12,483.45
  4. Step 4: Simplify right side
    20,981.07x = 361,401,869.56
  5. Step 5: Solve for x
    x = 361,401,869.56/20,981.07
  6. Step 6: Final answer
    x = 17,225.14

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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.