Home / 21,090.04-31,646.35-13,692.76

Finding the Fourth Proportional to 21,090.04, 31,646.35 and 13,692.76

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Solution

The fourth proportional to 21,090.04, 31,646.35 and 13,692.76 is: 20,546.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.04 : 31,646.35 = 13,692.76 : x
  2. Step 2: Convert to fraction form
    21,090.04/31,646.35 = 13,692.76/x
  3. Step 3: Cross multiply
    21,090.04x = 31,646.35 × 13,692.76
  4. Step 4: Simplify right side
    21,090.04x = 433,325,875.43
  5. Step 5: Solve for x
    x = 433,325,875.43/21,090.04
  6. Step 6: Final answer
    x = 20,546.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.