Home / 21,005.21-31,518.75-9,326.63

Finding the Fourth Proportional to 21,005.21, 31,518.75 and 9,326.63

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Solution

The fourth proportional to 21,005.21, 31,518.75 and 9,326.63 is: 13,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.21 : 31,518.75 = 9,326.63 : x
  2. Step 2: Convert to fraction form
    21,005.21/31,518.75 = 9,326.63/x
  3. Step 3: Cross multiply
    21,005.21x = 31,518.75 × 9,326.63
  4. Step 4: Simplify right side
    21,005.21x = 293,963,561.72
  5. Step 5: Solve for x
    x = 293,963,561.72/21,005.21
  6. Step 6: Final answer
    x = 13,994.80

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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.