Home / 13,315.65-18,242.23-12,817.09

Finding the Fourth Proportional to 13,315.65, 18,242.23 and 12,817.09

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Solution

The fourth proportional to 13,315.65, 18,242.23 and 12,817.09 is: 17,559.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.65 : 18,242.23 = 12,817.09 : x
  2. Step 2: Convert to fraction form
    13,315.65/18,242.23 = 12,817.09/x
  3. Step 3: Cross multiply
    13,315.65x = 18,242.23 × 12,817.09
  4. Step 4: Simplify right side
    13,315.65x = 233,812,303.71
  5. Step 5: Solve for x
    x = 233,812,303.71/13,315.65
  6. Step 6: Final answer
    x = 17,559.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.