Home / 30,630.63-42,274.85-18,700.91

Finding the Fourth Proportional to 30,630.63, 42,274.85 and 18,700.91

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Solution

The fourth proportional to 30,630.63, 42,274.85 and 18,700.91 is: 25,810.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.63 : 42,274.85 = 18,700.91 : x
  2. Step 2: Convert to fraction form
    30,630.63/42,274.85 = 18,700.91/x
  3. Step 3: Cross multiply
    30,630.63x = 42,274.85 × 18,700.91
  4. Step 4: Simplify right side
    30,630.63x = 790,578,165.11
  5. Step 5: Solve for x
    x = 790,578,165.11/30,630.63
  6. Step 6: Final answer
    x = 25,810.05

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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.