Home / 30,956.16-42,718.90-18,210.72

Finding the Fourth Proportional to 30,956.16, 42,718.90 and 18,210.72

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Solution

The fourth proportional to 30,956.16, 42,718.90 and 18,210.72 is: 25,130.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,956.16 : 42,718.90 = 18,210.72 : x
  2. Step 2: Convert to fraction form
    30,956.16/42,718.90 = 18,210.72/x
  3. Step 3: Cross multiply
    30,956.16x = 42,718.90 × 18,210.72
  4. Step 4: Simplify right side
    30,956.16x = 777,941,926.61
  5. Step 5: Solve for x
    x = 777,941,926.61/30,956.16
  6. Step 6: Final answer
    x = 25,130.44

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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.