Home / 21,090.64-31,570.08-14,076.40

Finding the Fourth Proportional to 21,090.64, 31,570.08 and 14,076.40

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Solution

The fourth proportional to 21,090.64, 31,570.08 and 14,076.40 is: 21,070.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.64 : 31,570.08 = 14,076.40 : x
  2. Step 2: Convert to fraction form
    21,090.64/31,570.08 = 14,076.40/x
  3. Step 3: Cross multiply
    21,090.64x = 31,570.08 × 14,076.40
  4. Step 4: Simplify right side
    21,090.64x = 444,393,074.11
  5. Step 5: Solve for x
    x = 444,393,074.11/21,090.64
  6. Step 6: Final answer
    x = 21,070.63

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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.