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Finding the Fourth Proportional to 28,596.69, 39,457.80 and 17,980.16

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Solution

The fourth proportional to 28,596.69, 39,457.80 and 17,980.16 is: 24,809.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,596.69 : 39,457.80 = 17,980.16 : x
  2. Step 2: Convert to fraction form
    28,596.69/39,457.80 = 17,980.16/x
  3. Step 3: Cross multiply
    28,596.69x = 39,457.80 × 17,980.16
  4. Step 4: Simplify right side
    28,596.69x = 709,457,359.96
  5. Step 5: Solve for x
    x = 709,457,359.96/28,596.69
  6. Step 6: Final answer
    x = 24,809.07

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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.