Home / 21,000.03-28,977.27-12,937.91

Finding the Fourth Proportional to 21,000.03, 28,977.27 and 12,937.91

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Solution

The fourth proportional to 21,000.03, 28,977.27 and 12,937.91 is: 17,852.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.03 : 28,977.27 = 12,937.91 : x
  2. Step 2: Convert to fraction form
    21,000.03/28,977.27 = 12,937.91/x
  3. Step 3: Cross multiply
    21,000.03x = 28,977.27 × 12,937.91
  4. Step 4: Simplify right side
    21,000.03x = 374,905,166.42
  5. Step 5: Solve for x
    x = 374,905,166.42/21,000.03
  6. Step 6: Final answer
    x = 17,852.60

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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.