Home / 28,518.16-42,748.53-11,887.40

Finding the Fourth Proportional to 28,518.16, 42,748.53 and 11,887.40

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Solution

The fourth proportional to 28,518.16, 42,748.53 and 11,887.40 is: 17,819.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.16 : 42,748.53 = 11,887.40 : x
  2. Step 2: Convert to fraction form
    28,518.16/42,748.53 = 11,887.40/x
  3. Step 3: Cross multiply
    28,518.16x = 42,748.53 × 11,887.40
  4. Step 4: Simplify right side
    28,518.16x = 508,168,875.52
  5. Step 5: Solve for x
    x = 508,168,875.52/28,518.16
  6. Step 6: Final answer
    x = 17,819.13

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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.