Finding the Fourth Proportional to 18,139,280.70, 25,032,207.36 and 9,990,518.70
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Solution
The fourth proportional to 18,139,280.70, 25,032,207.36 and 9,990,518.70 is: 13,786,915.80
Step by Step Solution
- Step 1: Write the proportion equation
18,139,280.70 : 25,032,207.36 = 9,990,518.70 : x - Step 2: Convert to fraction form
18,139,280.70/25,032,207.36 = 9,990,518.70/x - Step 3: Cross multiply
18,139,280.70x = 25,032,207.36 × 9,990,518.70 - Step 4: Simplify right side
18,139,280.70x = 250,084,735,732,357.59 - Step 5: Solve for x
x = 250,084,735,732,357.59/18,139,280.70 - Step 6: Final answer
x = 13,786,915.80
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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.