Home / 28,535.65-42,813.57-12,739.21

Finding the Fourth Proportional to 28,535.65, 42,813.57 and 12,739.21

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Solution

The fourth proportional to 28,535.65, 42,813.57 and 12,739.21 is: 19,113.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.65 : 42,813.57 = 12,739.21 : x
  2. Step 2: Convert to fraction form
    28,535.65/42,813.57 = 12,739.21/x
  3. Step 3: Cross multiply
    28,535.65x = 42,813.57 × 12,739.21
  4. Step 4: Simplify right side
    28,535.65x = 545,411,059.08
  5. Step 5: Solve for x
    x = 545,411,059.08/28,535.65
  6. Step 6: Final answer
    x = 19,113.32

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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.