Home / 18,130.36-25,038.91-12,479.70

Finding the Fourth Proportional to 18,130.36, 25,038.91 and 12,479.70

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Solution

The fourth proportional to 18,130.36, 25,038.91 and 12,479.70 is: 17,235.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,130.36 : 25,038.91 = 12,479.70 : x
  2. Step 2: Convert to fraction form
    18,130.36/25,038.91 = 12,479.70/x
  3. Step 3: Cross multiply
    18,130.36x = 25,038.91 × 12,479.70
  4. Step 4: Simplify right side
    18,130.36x = 312,478,085.13
  5. Step 5: Solve for x
    x = 312,478,085.13/18,130.36
  6. Step 6: Final answer
    x = 17,235.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.