Home / 28,984.70-39,980.30-19,905.68

Finding the Fourth Proportional to 28,984.70, 39,980.30 and 19,905.68

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Solution

The fourth proportional to 28,984.70, 39,980.30 and 19,905.68 is: 27,457.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,984.70 : 39,980.30 = 19,905.68 : x
  2. Step 2: Convert to fraction form
    28,984.70/39,980.30 = 19,905.68/x
  3. Step 3: Cross multiply
    28,984.70x = 39,980.30 × 19,905.68
  4. Step 4: Simplify right side
    28,984.70x = 795,835,058.10
  5. Step 5: Solve for x
    x = 795,835,058.10/28,984.70
  6. Step 6: Final answer
    x = 27,457.07

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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.