Home / 21,071.07-31,631.04-12,312.27

Finding the Fourth Proportional to 21,071.07, 31,631.04 and 12,312.27

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Solution

The fourth proportional to 21,071.07, 31,631.04 and 12,312.27 is: 18,482.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.07 : 31,631.04 = 12,312.27 : x
  2. Step 2: Convert to fraction form
    21,071.07/31,631.04 = 12,312.27/x
  3. Step 3: Cross multiply
    21,071.07x = 31,631.04 × 12,312.27
  4. Step 4: Simplify right side
    21,071.07x = 389,449,904.86
  5. Step 5: Solve for x
    x = 389,449,904.86/21,071.07
  6. Step 6: Final answer
    x = 18,482.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.