Home / 28,130.40-38,820.24-15,555.60

Finding the Fourth Proportional to 28,130.40, 38,820.24 and 15,555.60

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Solution

The fourth proportional to 28,130.40, 38,820.24 and 15,555.60 is: 21,466.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.40 : 38,820.24 = 15,555.60 : x
  2. Step 2: Convert to fraction form
    28,130.40/38,820.24 = 15,555.60/x
  3. Step 3: Cross multiply
    28,130.40x = 38,820.24 × 15,555.60
  4. Step 4: Simplify right side
    28,130.40x = 603,872,125.34
  5. Step 5: Solve for x
    x = 603,872,125.34/28,130.40
  6. Step 6: Final answer
    x = 21,466.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.