Home / 21,931.40-32,870.10-14,911.40

Finding the Fourth Proportional to 21,931.40, 32,870.10 and 14,911.40

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Solution

The fourth proportional to 21,931.40, 32,870.10 and 14,911.40 is: 22,348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.40 : 32,870.10 = 14,911.40 : x
  2. Step 2: Convert to fraction form
    21,931.40/32,870.10 = 14,911.40/x
  3. Step 3: Cross multiply
    21,931.40x = 32,870.10 × 14,911.40
  4. Step 4: Simplify right side
    21,931.40x = 490,139,209.14
  5. Step 5: Solve for x
    x = 490,139,209.14/21,931.40
  6. Step 6: Final answer
    x = 22,348.74

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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.