Home / 14,070.07-21,105.14-5,640.40

Finding the Fourth Proportional to 14,070.07, 21,105.14 and 5,640.40

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Solution

The fourth proportional to 14,070.07, 21,105.14 and 5,640.40 is: 8,460.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,070.07 : 21,105.14 = 5,640.40 : x
  2. Step 2: Convert to fraction form
    14,070.07/21,105.14 = 5,640.40/x
  3. Step 3: Cross multiply
    14,070.07x = 21,105.14 × 5,640.40
  4. Step 4: Simplify right side
    14,070.07x = 119,041,461.56
  5. Step 5: Solve for x
    x = 119,041,461.56/14,070.07
  6. Step 6: Final answer
    x = 8,460.62

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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.