Home / 15,457.80-21,331.71-8,384.21

Finding the Fourth Proportional to 15,457.80, 21,331.71 and 8,384.21

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Solution

The fourth proportional to 15,457.80, 21,331.71 and 8,384.21 is: 11,570.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,457.80 : 21,331.71 = 8,384.21 : x
  2. Step 2: Convert to fraction form
    15,457.80/21,331.71 = 8,384.21/x
  3. Step 3: Cross multiply
    15,457.80x = 21,331.71 × 8,384.21
  4. Step 4: Simplify right side
    15,457.80x = 178,849,429.64
  5. Step 5: Solve for x
    x = 178,849,429.64/15,457.80
  6. Step 6: Final answer
    x = 11,570.17

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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.