Home / 28,130.94-38,820.60-15,555.69

Finding the Fourth Proportional to 28,130.94, 38,820.60 and 15,555.69

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Solution

The fourth proportional to 28,130.94, 38,820.60 and 15,555.69 is: 21,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.94 : 38,820.60 = 15,555.69 : x
  2. Step 2: Convert to fraction form
    28,130.94/38,820.60 = 15,555.69/x
  3. Step 3: Cross multiply
    28,130.94x = 38,820.60 × 15,555.69
  4. Step 4: Simplify right side
    28,130.94x = 603,881,219.21
  5. Step 5: Solve for x
    x = 603,881,219.21/28,130.94
  6. Step 6: Final answer
    x = 21,466.80

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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.