Home / 30,645.53-42,302.77-19,312.81

Finding the Fourth Proportional to 30,645.53, 42,302.77 and 19,312.81

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Solution

The fourth proportional to 30,645.53, 42,302.77 and 19,312.81 is: 26,659.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,645.53 : 42,302.77 = 19,312.81 : x
  2. Step 2: Convert to fraction form
    30,645.53/42,302.77 = 19,312.81/x
  3. Step 3: Cross multiply
    30,645.53x = 42,302.77 × 19,312.81
  4. Step 4: Simplify right side
    30,645.53x = 816,985,205.44
  5. Step 5: Solve for x
    x = 816,985,205.44/30,645.53
  6. Step 6: Final answer
    x = 26,659.19

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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.