Home / 21,216.16-31,775.80-10,130.63

Finding the Fourth Proportional to 21,216.16, 31,775.80 and 10,130.63

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Solution

The fourth proportional to 21,216.16, 31,775.80 and 10,130.63 is: 15,172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.16 : 31,775.80 = 10,130.63 : x
  2. Step 2: Convert to fraction form
    21,216.16/31,775.80 = 10,130.63/x
  3. Step 3: Cross multiply
    21,216.16x = 31,775.80 × 10,130.63
  4. Step 4: Simplify right side
    21,216.16x = 321,908,872.75
  5. Step 5: Solve for x
    x = 321,908,872.75/21,216.16
  6. Step 6: Final answer
    x = 15,172.82

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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.