Home / 12,417.90-18,509.87-11,421.45

Finding the Fourth Proportional to 12,417.90, 18,509.87 and 11,421.45

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Solution

The fourth proportional to 12,417.90, 18,509.87 and 11,421.45 is: 17,024.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,417.90 : 18,509.87 = 11,421.45 : x
  2. Step 2: Convert to fraction form
    12,417.90/18,509.87 = 11,421.45/x
  3. Step 3: Cross multiply
    12,417.90x = 18,509.87 × 11,421.45
  4. Step 4: Simplify right side
    12,417.90x = 211,409,554.71
  5. Step 5: Solve for x
    x = 211,409,554.71/12,417.90
  6. Step 6: Final answer
    x = 17,024.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.