Home / 21,075.57-31,637.79-12,316.77

Finding the Fourth Proportional to 21,075.57, 31,637.79 and 12,316.77

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Solution

The fourth proportional to 21,075.57, 31,637.79 and 12,316.77 is: 18,489.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.57 : 31,637.79 = 12,316.77 : x
  2. Step 2: Convert to fraction form
    21,075.57/31,637.79 = 12,316.77/x
  3. Step 3: Cross multiply
    21,075.57x = 31,637.79 × 12,316.77
  4. Step 4: Simplify right side
    21,075.57x = 389,675,382.74
  5. Step 5: Solve for x
    x = 389,675,382.74/21,075.57
  6. Step 6: Final answer
    x = 18,489.44

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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.