Home / 28,638.32-42,970.23-11,109.51

Finding the Fourth Proportional to 28,638.32, 42,970.23 and 11,109.51

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Solution

The fourth proportional to 28,638.32, 42,970.23 and 11,109.51 is: 16,669.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638.32 : 42,970.23 = 11,109.51 : x
  2. Step 2: Convert to fraction form
    28,638.32/42,970.23 = 11,109.51/x
  3. Step 3: Cross multiply
    28,638.32x = 42,970.23 × 11,109.51
  4. Step 4: Simplify right side
    28,638.32x = 477,378,199.89
  5. Step 5: Solve for x
    x = 477,378,199.89/28,638.32
  6. Step 6: Final answer
    x = 16,669.21

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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.