Home / 28,388.04-39,191.81-19,672.80

Finding the Fourth Proportional to 28,388.04, 39,191.81 and 19,672.80

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Solution

The fourth proportional to 28,388.04, 39,191.81 and 19,672.80 is: 27,159.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.04 : 39,191.81 = 19,672.80 : x
  2. Step 2: Convert to fraction form
    28,388.04/39,191.81 = 19,672.80/x
  3. Step 3: Cross multiply
    28,388.04x = 39,191.81 × 19,672.80
  4. Step 4: Simplify right side
    28,388.04x = 771,012,541.40
  5. Step 5: Solve for x
    x = 771,012,541.40/28,388.04
  6. Step 6: Final answer
    x = 27,159.77

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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.