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Finding the Fourth Proportional to 28,586.70, 40,079.70 and 28,586.70

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Solution

The fourth proportional to 28,586.70, 40,079.70 and 28,586.70 is: 40,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,586.70 : 40,079.70 = 28,586.70 : x
  2. Step 2: Convert to fraction form
    28,586.70/40,079.70 = 28,586.70/x
  3. Step 3: Cross multiply
    28,586.70x = 40,079.70 × 28,586.70
  4. Step 4: Simplify right side
    28,586.70x = 1,145,746,359.99
  5. Step 5: Solve for x
    x = 1,145,746,359.99/28,586.70
  6. Step 6: Final answer
    x = 40,079.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.