Home / 21,030.57-31,530.20-9,930.93

Finding the Fourth Proportional to 21,030.57, 31,530.20 and 9,930.93

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Solution

The fourth proportional to 21,030.57, 31,530.20 and 9,930.93 is: 14,889.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.57 : 31,530.20 = 9,930.93 : x
  2. Step 2: Convert to fraction form
    21,030.57/31,530.20 = 9,930.93/x
  3. Step 3: Cross multiply
    21,030.57x = 31,530.20 × 9,930.93
  4. Step 4: Simplify right side
    21,030.57x = 313,124,159.43
  5. Step 5: Solve for x
    x = 313,124,159.43/21,030.57
  6. Step 6: Final answer
    x = 14,889.00

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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.