Home / 28,190.16-42,285.12-7,130.40

Finding the Fourth Proportional to 28,190.16, 42,285.12 and 7,130.40

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Solution

The fourth proportional to 28,190.16, 42,285.12 and 7,130.40 is: 10,695.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.16 : 42,285.12 = 7,130.40 : x
  2. Step 2: Convert to fraction form
    28,190.16/42,285.12 = 7,130.40/x
  3. Step 3: Cross multiply
    28,190.16x = 42,285.12 × 7,130.40
  4. Step 4: Simplify right side
    28,190.16x = 301,509,819.65
  5. Step 5: Solve for x
    x = 301,509,819.65/28,190.16
  6. Step 6: Final answer
    x = 10,695.57

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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.