Home / 30,666.76-42,312.48-18,725.68

Finding the Fourth Proportional to 30,666.76, 42,312.48 and 18,725.68

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Solution

The fourth proportional to 30,666.76, 42,312.48 and 18,725.68 is: 25,836.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,666.76 : 42,312.48 = 18,725.68 : x
  2. Step 2: Convert to fraction form
    30,666.76/42,312.48 = 18,725.68/x
  3. Step 3: Cross multiply
    30,666.76x = 42,312.48 × 18,725.68
  4. Step 4: Simplify right side
    30,666.76x = 792,329,960.49
  5. Step 5: Solve for x
    x = 792,329,960.49/30,666.76
  6. Step 6: Final answer
    x = 25,836.77

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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.