Home / 8,715.65-12,026.21-5,130.79

Finding the Fourth Proportional to 8,715.65, 12,026.21 and 5,130.79

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Solution

The fourth proportional to 8,715.65, 12,026.21 and 5,130.79 is: 7,079.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.65 : 12,026.21 = 5,130.79 : x
  2. Step 2: Convert to fraction form
    8,715.65/12,026.21 = 5,130.79/x
  3. Step 3: Cross multiply
    8,715.65x = 12,026.21 × 5,130.79
  4. Step 4: Simplify right side
    8,715.65x = 61,703,902.29
  5. Step 5: Solve for x
    x = 61,703,902.29/8,715.65
  6. Step 6: Final answer
    x = 7,079.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.