Home / 30,971.19-42,740.05-16,823.91

Finding the Fourth Proportional to 30,971.19, 42,740.05 and 16,823.91

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Solution

The fourth proportional to 30,971.19, 42,740.05 and 16,823.91 is: 23,216.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,971.19 : 42,740.05 = 16,823.91 : x
  2. Step 2: Convert to fraction form
    30,971.19/42,740.05 = 16,823.91/x
  3. Step 3: Cross multiply
    30,971.19x = 42,740.05 × 16,823.91
  4. Step 4: Simplify right side
    30,971.19x = 719,054,754.60
  5. Step 5: Solve for x
    x = 719,054,754.60/30,971.19
  6. Step 6: Final answer
    x = 23,216.89

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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.