Home / 21,205.60-31,808.40-13,332.40

Finding the Fourth Proportional to 21,205.60, 31,808.40 and 13,332.40

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Solution

The fourth proportional to 21,205.60, 31,808.40 and 13,332.40 is: 19,998.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.60 : 31,808.40 = 13,332.40 : x
  2. Step 2: Convert to fraction form
    21,205.60/31,808.40 = 13,332.40/x
  3. Step 3: Cross multiply
    21,205.60x = 31,808.40 × 13,332.40
  4. Step 4: Simplify right side
    21,205.60x = 424,082,312.16
  5. Step 5: Solve for x
    x = 424,082,312.16/21,205.60
  6. Step 6: Final answer
    x = 19,998.60

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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.