Home / 21,075.36-31,618.80-7,225.44

Finding the Fourth Proportional to 21,075.36, 31,618.80 and 7,225.44

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Solution

The fourth proportional to 21,075.36, 31,618.80 and 7,225.44 is: 10,840.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.36 : 31,618.80 = 7,225.44 : x
  2. Step 2: Convert to fraction form
    21,075.36/31,618.80 = 7,225.44/x
  3. Step 3: Cross multiply
    21,075.36x = 31,618.80 × 7,225.44
  4. Step 4: Simplify right side
    21,075.36x = 228,459,742.27
  5. Step 5: Solve for x
    x = 228,459,742.27/21,075.36
  6. Step 6: Final answer
    x = 10,840.13

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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.