Home / 21,210.30-31,798.80-9,515.34

Finding the Fourth Proportional to 21,210.30, 31,798.80 and 9,515.34

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Solution

The fourth proportional to 21,210.30, 31,798.80 and 9,515.34 is: 14,265.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.30 : 31,798.80 = 9,515.34 : x
  2. Step 2: Convert to fraction form
    21,210.30/31,798.80 = 9,515.34/x
  3. Step 3: Cross multiply
    21,210.30x = 31,798.80 × 9,515.34
  4. Step 4: Simplify right side
    21,210.30x = 302,576,393.59
  5. Step 5: Solve for x
    x = 302,576,393.59/21,210.30
  6. Step 6: Final answer
    x = 14,265.54

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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.