Home / 20,911,000.40-31,349,911.80-11,455,384.40

Finding the Fourth Proportional to 20,911,000.40, 31,349,911.80 and 11,455,384.40

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Solution

The fourth proportional to 20,911,000.40, 31,349,911.80 and 11,455,384.40 is: 17,173,988.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911,000.40 : 31,349,911.80 = 11,455,384.40 : x
  2. Step 2: Convert to fraction form
    20,911,000.40/31,349,911.80 = 11,455,384.40/x
  3. Step 3: Cross multiply
    20,911,000.40x = 31,349,911.80 × 11,455,384.40
  4. Step 4: Simplify right side
    20,911,000.40x = 359,125,290,575,095.94
  5. Step 5: Solve for x
    x = 359,125,290,575,095.94/20,911,000.40
  6. Step 6: Final answer
    x = 17,173,988.99

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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.