Home / 21,000.40-28,984.52-13,045.84

Finding the Fourth Proportional to 21,000.40, 28,984.52 and 13,045.84

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Solution

The fourth proportional to 21,000.40, 28,984.52 and 13,045.84 is: 18,005.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.40 : 28,984.52 = 13,045.84 : x
  2. Step 2: Convert to fraction form
    21,000.40/28,984.52 = 13,045.84/x
  3. Step 3: Cross multiply
    21,000.40x = 28,984.52 × 13,045.84
  4. Step 4: Simplify right side
    21,000.40x = 378,127,410.40
  5. Step 5: Solve for x
    x = 378,127,410.40/21,000.40
  6. Step 6: Final answer
    x = 18,005.72

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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.