Home / 30,878.51-42,596.63-19,528.88

Finding the Fourth Proportional to 30,878.51, 42,596.63 and 19,528.88

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Solution

The fourth proportional to 30,878.51, 42,596.63 and 19,528.88 is: 26,939.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,878.51 : 42,596.63 = 19,528.88 : x
  2. Step 2: Convert to fraction form
    30,878.51/42,596.63 = 19,528.88/x
  3. Step 3: Cross multiply
    30,878.51x = 42,596.63 × 19,528.88
  4. Step 4: Simplify right side
    30,878.51x = 831,864,165.05
  5. Step 5: Solve for x
    x = 831,864,165.05/30,878.51
  6. Step 6: Final answer
    x = 26,939.91

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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.