Home / 28,031.40-42,047.10-11,385.90

Finding the Fourth Proportional to 28,031.40, 42,047.10 and 11,385.90

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Solution

The fourth proportional to 28,031.40, 42,047.10 and 11,385.90 is: 17,078.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031.40 : 42,047.10 = 11,385.90 : x
  2. Step 2: Convert to fraction form
    28,031.40/42,047.10 = 11,385.90/x
  3. Step 3: Cross multiply
    28,031.40x = 42,047.10 × 11,385.90
  4. Step 4: Simplify right side
    28,031.40x = 478,744,075.89
  5. Step 5: Solve for x
    x = 478,744,075.89/28,031.40
  6. Step 6: Final answer
    x = 17,078.85

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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.