Home / 30,788.81-42,488.93-18,685.79

Finding the Fourth Proportional to 30,788.81, 42,488.93 and 18,685.79

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Solution

The fourth proportional to 30,788.81, 42,488.93 and 18,685.79 is: 25,786.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,788.81 : 42,488.93 = 18,685.79 : x
  2. Step 2: Convert to fraction form
    30,788.81/42,488.93 = 18,685.79/x
  3. Step 3: Cross multiply
    30,788.81x = 42,488.93 × 18,685.79
  4. Step 4: Simplify right side
    30,788.81x = 793,939,376.24
  5. Step 5: Solve for x
    x = 793,939,376.24/30,788.81
  6. Step 6: Final answer
    x = 25,786.62

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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.