Home / 28,090.08-38,727.40-21,636.98

Finding the Fourth Proportional to 28,090.08, 38,727.40 and 21,636.98

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Solution

The fourth proportional to 28,090.08, 38,727.40 and 21,636.98 is: 29,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,090.08 : 38,727.40 = 21,636.98 : x
  2. Step 2: Convert to fraction form
    28,090.08/38,727.40 = 21,636.98/x
  3. Step 3: Cross multiply
    28,090.08x = 38,727.40 × 21,636.98
  4. Step 4: Simplify right side
    28,090.08x = 837,943,979.25
  5. Step 5: Solve for x
    x = 837,943,979.25/28,090.08
  6. Step 6: Final answer
    x = 29,830.60

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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.